Motorcycle rake and trail calculator


Rake and trail. These parameters have a major influence on how a bike handles . 8". The wheelbase, seat height, fuel tank width, rake and other dimensions are all set to work with the qualities of the compact 2- cylinder engine to achieve a sporty, light and neutral handling character. The simplest way to calculate the difference in length required is to calculate the overall length of the forks PLUS the projection to the trail point; That is simply = vertical height at yoke/cos @ Do this for both rake angles (@) and subtract one result from the other Motorcycle Specifications, Data, Images, Articles Bikelinks Directory. if I was to offset my Triple tree from 2 inches to 4. This is trail, and is measured in inches. All usage of this vehicle should be limited to riding on a closed-course. Box 2550 Cortaro, Arizona 85652-2550 Phone: (520) 789-7265 Email: trikers@btw-hq. Some companies provide the Frame Rake, others provide Overall Rake-yet most report it as "Rake.


A longer trail means the motorcycle tends to keep traveling in a straight line. Thousands of enthusiasts enjoy touring on their motorcycles every day, and the motorcycle of choice is Honda's Gold Wing. What are rake and trail? And does angling the triple clamps relative to the frame really change the rake angle? Here’s a quick review of front-end geometry. Oddly enough, if adding rake in the neck increases trail, adding rake to the trees reduces trail. – All part of your bikes geometry. Because we are dealing with the “feel” of the motorcycle, normal trail must also be considered. Fork Offset ( Fork Rake ) B: Positive values: hub preceeds the steering axis (as shown in the image). The Devil's Whip map Devil's Whip - a 2000 foot elevation change and 160 curves in just 12 miles! Welcome to Maggie Valley 12 Pack - the 12 pack is a list of 12 of the top roads in the area - from the scenic views of the mile high Cherohala Skyway - to the technical twists and turns of Tail of the Dragon. Check out how great this R6 Raven looks with the jet black, matte black paint scheme and red 3D stickers.


Shortening the rear shock will increase rake and trail. This seminar takes participants beyond the basics of crash reconstruction to physical models and analysis techniques that are unique to the Head angle, fork rake, trail, and wheel flop: these are just some of the parameters that influence the steering and handling of a bike, however in the absence of any context, they often appear as what I did and a few folk do who have side cars is use the forks from a 80's maxim. For anyone on two wheels, motorcycling enthusiasts, Harley-Davidson Magazine, seekers of information on building and maintaining motorcycles, motorcycles for sale, Sturgis Rally. In order to increase the rake of a bike without making the trail too large, some bikers use raked trees. This programme calculates steering geometry parameters. Standard. We are also the only Alaskan dealer representing fully electric motorcycles from Zero Motorcycles. Not to be confused with the curvature of the fork blades, which some people think of as “rake”. But its a direct swap of parts, and works wonders for any 81-83 virago, trike, side car or what not.


Welcome to the second part of our short digression about motorcycle geometry. Let us think about different ways to change rake and trail. The result is 4. Steering Geometry calculator. A shorter trail will allow the motorcycle to turn easier, but be less stable going straight. " Very few give both numbers or what their definition of Rake is. Motorcycle Rake and Trail - Tech Tips - Dirt Rider Magazine. Chopper Kits For Harley-Davidson® Dyna Wide Glide Models. With KTM adjustable steering stem soon to be released, we thought we might address an explanation of this subject.


except that would give me 7. Usually adjustable in 3, 5, 7 degrees of rake. Let’s talk about ‘trail’ to understand the rest. To visualize trail, draw an imaginary line along the path of the headset tube to the ground. In general, more rake provides greater straight line stability, less rake makes the bike more responsive. Which fixes the rake n trail problems. Note: Trail cannot be a negative number as this will adversely affect handling unless you are building a shopping cart. All of the rake trail calculaters i have found tell how to measure trail with a The best way to obtain a particular trail has been the subject of more than a few bar fights. Rake and Trail 101.


MINIMUM: Rake: 20 degrees - Trail: 2 inches [5. Rake is determined by the angle of the steering head tube as it relates to the surface on which the motorcycle is sitting. MFE is a collection of work-in-progress tools for motorcycle front end setup and design. This mid-size bike has plenty of power with its liquid-cooled engine, cast aluminum frame and fleet-sided fenders. 5 inches of trail. In general steeper rake and less trail = quicker steering - but at the expense of straight line stability. com. O. My question is rake angle and trail for a trackmaster frame.


to expensive motorcycles, snowmobiles,… Triple tree rake 3 That makes trail 4. When you look at what is loaded on these trailers you may find everything from an unknown load quantity of dirt, stone etc. Improve the ride of your Harley-Davidson® FXDWG, and give it a Custom Motorcycle Look, in 1 day! ( no modifications to your stock motorcycle) Offering three choices of rake The Harley-Davidson Heritage Softail Classic has hidden rear shocks, whitewall tires, studded leather, laced wheels, and a 7 inch ball headlamp. Head angle, fork rake and trail. does Sunstar is the largest OEM supplier of motorcycle and all terrain vehicle (ATV) sprockets and brake discs in the world. 3 gallons) at around 150 miles and goes bone-dry at 206 miles. com - Fork Geometry Calculator A tip about calculating trail - while you can probably accept the geometry numbers (head tube angle and fork rake) from Colnago because they made both the frame and the fork and designed them as a unit, you sometimes can't make the same assumptions about a bike where the frame is built with a fork that is Rake trail calculator design and development of a chopper bike frame even though the kit is made to be as universal possible a few key features your bike should have … A little research suggests that the steering angle is steeper, but that trail overall is similar between the two bikes. From scenic Highway 101 along California's Pacific Coast to Colorado's Garden of the Gods, from cruising Daytona Bike Week in March to watching New England leaves turn color in October, Gold Wings open a window on practically every corner of this country. .


Take a look at FIGURE 5 -it is the same bike-but with 6 degree raked trees. Primary among these are wheelbase, steering axis angle, fork offset, and trail. Calculator updated 9/11/06 to provide more realistic trail values. In your case you can get that with a fork having less rake. Estimated monthly payment will depend on vehicle make and model and will be determined upon actual/vehicle inspection. Rake? By "rake" we mean the angle with the vertical. Trail is the most important part of the equation. This programme calculates the mass centre, moments of inertia and weight distribution of a motorcycle when the masses and CoG locations of various components are input. The bike even looks tougher too.


Rake must be in degrees, while offset and front tire radius can be in any units provided the same units are used for both Trail Causes Self-correction By: James R. We want trail to remain pretty constant across all steering angles, even if those are 1-3 degrees under usual circumstances. I've change over a fork before and it did effect the handling (I ronically I went form a 40mm to a 43mm and found the bike to be more stable) so I was wondering if I could get an idea why on this perticular bike this happened, and also I'm looking at Just because you have a bigger wheel, it doesn't mean you need to skimp on performance. Popular with anyone needing a reliable, high fuel-efficiency model. Straight blade forks can have plenty of offset. And this blacked-out version creates an even more dramatic look. A 26-degree rake is the same thing as a 64-degree head angle. I was hoping that doing this would restore the rake/trail settings to somewhat closer to original specs after mounting the 110/90. Rake and Trail: Fork Rake is also known as Offset, which more accurately describes what it is: the hub’s offset from the steering axis.


Large Caster/Rake and Trail give better high speed stability-tracking-longer wheel base and poorer low speed handling. The reconstruction and analysis of motorcycle crashes requires a specialized set of skills and knowledge beyond those required for typical four wheel vehicles. On the Honda Valkyrie and the Honda VTX models, rake is 32° and trail is nearly six full inches. The 1700cc kit consists of new pistons, liners, camshafts, up-rated clutch springs and '1700' clutch cover embellisher. Shop with confidence. 0”, front tire dia = 23. 2019 TRI GLIDE ® ULTRA. In most cases, increasing the rake of a bike's frame will increase positive trail, though this depends on what kind of fork assembly you use. Rake, trail, and offset are inter-related.


Check out this Used 2016 Yamaha YZ250 Motorcycle for sale in our used Motorcycle classifieds. so . So today we’re going to simplify it for you and show you how rake and trail work hand-in-hand to enhance your motorcycle’s performance. Loaded with features, this sporty vehicle is a versatile and comfortable ride. These parameters have a major influence on how a bike handles. Rake, trail and offset. A cycle with zero degrees of rake has a stem that is perpendicular to the ground or in other words straight up and down. A poor condition motorcycle is one best left to the professional for restoration. Usually adjustable in 3, 5, and 7 degrees of rake.


" Other aspects It's very important to talk about dynamic trail--I could build a bike that has a 90 degree head tube and an appropriate rake and quote a certain trail. Run it shorter, and you get less trail. Putting it all together A happy medium of the proper rake and trail maintains stability, while allowing the motorcycle to turn without too much effort. "Rake & Trail" by Max McAllister of Traxxion Dymamics Traxxion Dynamics, Inc. By james parker posted Aug 5th, 2009 at 12:55pm. Comments. There's a lot of information out there about rake and trail , seems as though 2 inches of trail works best for everyone . They landed on the sleek and powerful streamliner locomotives of the 1950s. STEERING 101: How it works.


Dynamics falls under a branch of physics known as classical mechanics. The look that you are trying to achieve, the height of the wheels and tires that you are going to use, rake and height of the frame as well as the rake of the triple trees. In motorcycles, the steering axis angle is called the rake angle or just rake and is measured from the vertical. Often mentioned in the main stats when looking at a new motorbike, but what do motorcycle rake and trail actually mean and why would you need to know this? Firstly, these terms refer to steering geometry and so rake, trail and offset effect handling and are directly linked to each other, altering one will effect the other. by Timothy John. Most Harley® riders make changes in their bikes rake without realizing it. Does anyone have any information on that change? Exact rake numbers, old/new, and what year the change was made? If the newer model frames have a steeper rake angle, I'd be interested in obtaining one for my race bike. Buyer’s guide: bicycle geometry A step-by-step guide to the tubes, angles, and profiles of the chassis of your next bike. The larger the rake angle the larger the trail.


RB Racing Professional Rake and Trail Calculator RB Racing Professional Rake and Trail Calculator Reduced to its essence, the 919 specific trail change guideline is this: For every 5 mm of sag or tube position change, the trail changes by a nominal 1 mm. Fork Rake Comparison for 57cm Bikes: Touring forks 45-52mm Road forks 40-45mm CX forks 45mm. It also has a Six Speed Cruise Drive, Dunlop tires and full length rider floorboards. Higher trail will make the bike feel more solid and stable as the speed increases. Rake Frame geometry, rake and trail are important components in how your motorcycle rides, but that doesn’t make them any less complicated or frustrating to understand. But I'd piss myself to ride it. A stock Harley Davidson has any were from a 28 degree rake to a 34 degree rake. Trail is measured two different ways, with most measuring and reporting what is known as "False Trail," which is useful for comparisons between setups but not accurate. .


Japanese Marques Honda Kawasaki Suzuki Yamaha European Marques Aprilia BMW Ducati KTM Moto Guzzi American Motorcycles Buell Classic Motorcycles Britten Brough Superior Bultaco Cotton Douglas Excelsior Jawa Matchless Galleries Motorcycle Books & Manuals More sag is advantageous for slower more technical riding as it changes the rake angle of the forks and effects the "trail" value. The trail plays a role in stabilizing the front-end by helping your tire develop a restoring force that attempts to keep your motorcycle traveling in a straight line. Finishes are all excellent! You will need new brake pads. 08 centimeters] positive. False trail is the distance on the ground between a vertical line from the axle to the neck/axle line extended to the ground. Changing the rake by modifying the frame, the triple-tree or both can make dramatic changes in the trail and, therefore, in the bike's handling. We often get questions such as: how is rake and trail measured? How do they affect one another? Is the optimal rake and trail different if I convert my bike to a trike? Well, to In this video we will show you the basic steps of how to modify the rake and trail of your motorcycle. The bike was connected to a sidecar rig for much of its prior life so thats why - needed the front end raked for the sidecar set up and whoever put it together probably didnt have an adjustable fork to use, so they went with a servi car fork instead which has a fixed rake. Fork Trail.


For over 40 years, Kelley Blue Book has been The Trusted Resource for Motorcycle values and pricing. Motorcycle is missing or has incorrect parts, i. 27th January 2014. It turns out that when designing a recumbent one should start with rider ergonomics, rather than the head tube angle. Rake and Trail – Why Geometry Matters The combination of motorcycle rake and trail is a critical success factor to your motorcycle's rideability. HOW TO MEASURE CORRECT TRAIL Harley-Davidson motorcyles can be raked and turned into the most radical choppers. A trail value greater than 5 inches will generate excessive fork flop. Working on a 1972 Benelli/Motobi 175cc for M-PG. Rake is the angle between a vertical line dropped from the head of the neck to the ground and a line going through the head to the axle.


That's ironic because Serotta first offered their titanium frame with a Serotta [Archive] 5 degree rake Sportster Motorcycle Suspension, Frame, Forks, Handlebars, For peace of mind I'd use a trail calculator just cause I like to know. Trail is a function of steering axis angle, fork offset, and wheel size. We have all the custom chopper parts you'll need. I know a bunch of folks on this forum have used them and are happy with the results. Great for straights. A motorcycle that can be registered under The Highway Traffic Act and has a body style that does not fit any of the other available motorcycle body styles. Pictured is a Big Dog K9 which has 39 degrees of rake, 3 degree raked trees, and 12" over forks. Tidbits on Brothers of the Third Wheel International P. 6”, triple clamp offset = 3.


If nothing else it will make you an expert in the pub. A 27. I have yet to be able to get the new trail number with a 21" wheel and any of these rake kits. When rake is added to a motorcycle, trail is often increased causing steering to become heavier. RSR Inlet Runner and Peak Torque Calculator Rake & Trail Calculator. trail and rake questions with triple trees and shocks. Manufacturer's specifications must include the specific rake and trail for each motorcycle or class of motorcycles and the terms "rake" and "trail" must be defined by the director by rules adopted pursuant to chapter 28-32. As the rear of the bike goes down the steering head angle steepens increasing the rake and trail. Motorcycle Rake Angle.


is there much in the way of mods need to the NSR stock top and bottom yokes. that formula would then place my bike lower on the front than I would want . Home / Tech Tips / Practical Ways to Select the Proper Motorcycle Fork Length. In fact, your bike probably came from the factory with Sunstar. Fortunately, sporty's have pretty low trail (4. and is there a specific model of NSR125 , looking on ebay there seems to be a few different looking Re: Rake or not rake a trike Frankenstein strongly recommends 7 deg raked trees, which substantially reduces trail and makes steering much lighter. In general, more rake provides greater straight-line stability, less rake makes the bike more responsive. We build our choppers to have between 4-6" of Trail for the best handling characteristics. It is raked trees to the rescue.


However, the rake, as well as the accompanying term trail, are really important for the movement of the bike and every single degree of inclination can change the way we ride. There is a great Rake-Stretch-Trail Calculator on Perse Performance's Website located at www. 19 Trail should be between 4" and 6" Add 2" to tubes and 1 degree to trees and trail is around 3. Pushing a cart pushes the front steertubes forward, and the wheels trail behind. Trusted on more brands than any other, Sunstar offers the best combination of lightweight, strength, quality and durability. “Trail” is harder to explain and the diagrams below will help clarify it. Offset, Rake, Steer Axis and Trail Explained. This distance is the trail – how far the wheel trails the rake geometry. " Other aspects Cannondale's Murray Washburn explains how rake and trail impact a bike's handling.


The trail calculator should be used as a design aid to give you a good idea of how changes in your bikes geometry effect the need for additional trail. With these classically styled machines as their guide, a new icon for Indian Motorcycle was born. Most people wouldn't put a steel fork on a Ti frame because of the weight penalty. Spec charts sometimes quote rake and trail numbers for a motorcycle chassis, but what does this mean? Learn more and find other motorcycle tips and tricks at CycleWorld. I just got an old cb750 chopper and know it has negative trail. 2016 Yamaha YZ250 for sale. The much discussed topic of Steering axis, Rake, Offset and Trail. Measure from this point to the center of the tire patch. Get all the premium features, starting with a Twin-Cooled™ Milwaukee-Eight ® 114 engine, an all-new BOOM!™ Box GTS infotainment system and enough storage space so you can pack enough to go for a good, long time.


With the help of this simple program, you can determine the correct combination of frame neck rake and triple tree offset. We build custom motorcycle gas tanks, oil bags, chopper fenders, springer forks. Not very extreme at all. I'm working on some (free) software to calculate the changes to various dimensions (rake, trail, wheelbase, neck height, axle-crown length) that would result from fork length change, tree rake, neck chop / up / out, and wheel size changes. 5 degrees. I do not think it would be over 5 inches but it depends on the length of the front forks. The front end will turn more easily and precisely, feels much better, less work but gives up some higher speed stability more typical on an MX track. perseperformance. These parameters have a major influence on how a bike handles A Quick Guide to Motorcycle Rake, Trail and Offset, Part 1 to the rake.


Please consider donating a few dollars towards our costs. It has a long girder front end. Calculate your bike's trail. CoG and weight distribution calculator. Find great deals on eBay for street glide rake kit. A long trail can cause the wear on the sides of the front tire to show earlier because of the "shear" effect in turns as your front wheel is pointed slightly in the direction of the turn. Bicycle and motorcycle geometry is the collection of key measurements (lengths and angles) that define a particular bike configuration. All parts are CNC machined and made in-house. 16".


The Twin Cam 103 gives it the power it needs to get you on the road and out of town. The Motorcycle Shop is a full-service motorcylce dealer located in Anchorage, AK, featuring brands such as BMW, Ducati, KTM, Kawasaki, and Triumph. 08 centimeters] positive Manufacturer's specifications must include the specific rake and trail for each motorcycle or class of motorcycles and the terms "rake" and "trail" must be defined by the director by rules adopted pursuant to chapter 28-32. To some individuals this is a “project or parts bike” at best. What makes a Chopper motorcycle a chopper? The rake. e. Raked Triple Trees-- In order to bring trail figures back into line, triple trees with raked steering stems can be used. 32. The rake is the angle of your steering neck compared to a line perpendicular to the frame.


Trail Calculator. To use the BikeRaceInfo Trail-o-Matic find your bike's head tube angle in degrees—between 70 and 76 degrees—across the top/bottom. Here is the issue . This is a discussion on trail and rake questions with triple trees and shocks within the Mean Streak Performance Upgrades forums, part of the Kawasaki Mean Streak category; i am purchasing the 7 degree triple trees and was wondering what size shock is installed on these? Bicycle and motorcycle dynamics is the science of the motion of bicycles and motorcycles and their components, due to the forces acting on them. Most choppers have a rake between 34 and 45 degrees. TRAIL: The distance defined by the vertical line from axle to ground and the intersection of centerline of the steering neck and ground. All springer frontends are individually made to the customer's bike for the correct length, rake and trail. Parts The pinnacle of the custom touring look taken to the edge and fully-loaded with our most powerful engine. With stock front forks and 10º of added rake would make 38º rake.


For example, Moto Guzzi [5] offers: a 2007 Breva V 1100 with a rake of 25°30’ (25. Everything works well on this front end as it should. Ride height can be adjusted by sliding the fork tubes up or down in Bicycle Trail Calculator. The trail of a motorcycle is defined as the distance measured form the center of the front tire’s contact patch to the When talking about motorcycle suspension most riders understand fork rake angle, or at least believe they do, but when the term “trail” is introduced, the body of knowledge seems to get a bit While there's a relationship between a bike's rake and its trail, it's not always obvious. 35) If you add 2" to tubes trail is around 4. Softail 5. The first piece dealt with rake and trail and how these two figures affect the steering and the overall feel of a Are building a custom chopper and need motorcycle parts. Rake is a term used to describe the angular relationship between the bikes steering stem and an imaginary vertical line dropped down from the centerline of the frame neck to the ground. All payments are estimate, tax, title and any other fees are extra.


36, that is a bloody shopping cart! 2 degree rake on tree and +2" on tubes gives about 5. Photo: My apologies for mixing terminology…that’s what I get for being anoutsider! In a different arena, rake is what bicyclists know I just bought a 2001 HD fatboy trike and would like to rake the front end to make it steer better. 5-degree head angle is a slacker angle and gives a steering-head angle measurement of 62. ” Design Inspiration: To design this fairing, our team looked for inspiration outside of the motorcycle industry. Trail (B) is measured in distance (inches or millimeters) between the point of the front wheel’s contact with the ground and a line drawn through the axis of the steering head. Every single degree of inclination can change the way your motorcycle handles. To the Point is a new series of articles that explains the ins and outs of your bike every Tuesday. Higher trail is what you're seeking. In other words you cant use rake for the sole purpose of changing trail because changing the rake will also affect handling and the length of the bike which will also affect handling.


Trail is the relationship of steering stem rake and front axle location. Run it taller, and you get more trail. All that said, I had a discussion with my dealer - they have done many 21-26. The product of the head tube angle and the fork rake is the ‘trail’. [4] A 0° rake would be vertical. 35" of Trail. Use this calculator to see what the chassis, rake, forks and triple clamps have to do with your magical "trail" figure. 1" trail. Share.


Current tools are intended to calculate static geometry, such as determining trail given a known setup, or taking a known setup and making a change to the fork length and calculating the new rake and trail. However, making a chopper safe to ride involves more than just what angle the front end rakes out from the frame. fenders, tank, seat, mechanics, installed. A rake is an angle of slope[ and for motorcycle is measured from the vertical. Advanced Instruments; A newly designed lightweight, compact, full LCD instrument panel is adopted. 6 inches stock), so you have a little room to play with. The rake of a 1976 CB750 was 28º with 4. To figure trail, set your bike up right and straight, with the forks straight ahead. RAKED TRIPLE TREES: In order to bring trail figures back into line, triple trees with raked steering stems can be used.


Knowing Rake and trail is huge in the build of a custom bike. Donate via Paypal at the bottom of this page or Contact Us for other ways to help. Three choices of rake, lets you stretch your motorcycles wheelbase, 4" to 12" over stock, and rake it out as much as 50° Not just a "raked triple tree", but a complete "rake system" that maintains the correct trail for good handling. Then go down the left/right vertical column find how much fork rake—bend in the fork—in centimeters your bike has. Technical Q&A with Lennard Zinn – Rake, trail, offset. This is a discussion on trail and rake questions with triple trees and shocks within the Mean Streak Performance Upgrades forums, part of the Kawasaki Mean Streak category; Hey streak07. GEARING COMMANDER: MOTORCYCLE GEARING, RPM, SPROCKET, SPEED, Bicycle and motorcycle geometry is the collection of key measurements (lengths and angles) that define a particular bike configuration. This was initially confusing to me because if you increase overall rake (angle between forks and vertical) by raking the frame only you increase trail. Thompson Choppers springer forks are all manufactured in-house to order Trail N: Distance between the contact point (center of the contact patch) of the front wheel on the floor and the point where the "virtually" elongated steering axis meets the ground.


Various Harley models have the following trail figures: FXR 4. Motorcyclists tend to speak of trail in relation to rake angle. Typical trail figures are between 4 and 6 inches. The trail on a motorcycle VeloBase. 0" to 5. Expressed in degrees. net Motorcycle Front Ends. Increasing your rake any more then 39 degrees in my eyes is a chopper. 3”, rake neck 26 deg, fork length = 24.


Trail becomes a function of where the handle bars and front wheels are placed, not the other way round. The amount of rake is significant in determining a motorcycle's handling characteristics. Rake and Trail Calculator This is a link to a rake and trail calculator you can input the specs on your bike and then change the rake using trees and put in the degree of change to see how it affects your bike. The Ninja H2 ™ R motorcycle is a closed-course riding use only model and is not manufactured for use on public roads, streets or highways. From the Best Selling Instructional DVD by Max McAllister, President of Traxxion Dynamics, Inc. If you use a springer or leading link it can be adjusted at the rockers ,,a telescopic front will be at the triple trees and should be part of the build . If I would have thought this through a bit more, instead of going for the 110/90, I should have mounted a 110/80-18, which is available as a Battleax V-rated tire. How To Build A This is a very unstable condition for both a shopping cart and a motorcycle. The front wheels of a shopping cart have casters, too, but they use a vertical steering angle and a backwards rake.


Basically your rake would be the angle of your steering neck. 22". The true trail on that bike is 2-1/2 inches; perfect. Special thanks to Sean from Empire Engineering for coming down to the shop for this project. Bike motions of interest include balancing, steering, braking, accelerating, suspension activation, and vibration. The basic elements of steering include rake, trail, and offset. (I think the real is 4. 9 inches (standard 19 inch wheel) and a 35mm offset , then trail is 92. 21" wheels are not a negative to handling.


The forks are 1 maybe 2 inches shorter. nearly perfectly stock trail. How to Determine Front Ends Length and Rake If you are trying to determine the length of a custom front end for your bike you should take many things in consideration. A combination of rake, trail, wheelbase length, mass distribution, frame geometry, engine mounting, drivetrain configuration and wheel speed determine the mixture of forces involved in turning a motorcycle. It's a hotly-debated topic among bike geeks these days -- some believe that it's a key factor which determines how a bicycle handles, especially with a front load. He suggests a rake kit for a 21", and with 6* says it will handle great. , but what I'm looking for is the 'sweet spot'. When Dirt Rider talks about the handling and geometry of a dirt bike, we This page includes an Excel version of the motorcycle rake and trail calculator. com, Imput your dimensions and the calculator will tell you if it will be a safe ride or not.


Find product information, color options and MSRP for the 2019 Indian Scout Motorcycle. 9" of trail . What is Rake and Trail I was sitting here eating a piece of pizza when I suddenly had an urge to share some information I have had several people ask me about Rake and Trail so I thought I would try to explain just what they are and how they relate to our sport. Kboyd was just asking questions about round track tires. calculated trail (mm) calculated flop (mm) (use the up/down cursor keys to increment/decrement values) Rake and Trail: Fork Rake is also known as Offset, which more accurately describes what it is: the hub’s offset from the steering axis. I never measured the resulting trail, but it was much less than factory, if not zero, which made for twitchy handling. The most affordable KYMCO scooter in the USA. Let’s see how, or if you want to skip fast forward, click on trail calculator. A change to trail can be made by raising or lowering the front or rear of the motorcycle, which changes the rake of the chassis.


The same is true for a bicycle. Research 1997 Harley-Davidson FXDWG Dyna Glide (Solid) prices and values at NADAguides. Trail? You would need to remeasure it. Rake and trail terms refer to motorcycle steering geometry, and, along with offset, have a great effect on the machine's handling and steering effort. 95" of trail, excessive by 2" But by the calculator . In the blue cells, fill in values for rake, offset and front tire radius. Consider the casters on a shopping cart: the wheels are offset behind the vertical steering axis, and the force of the ground on the wheel tries to center the wheel on the direction of travel. Trail: Take that vertical line through the centre of the front wheel. Rake and Trail .


Go on a legend reborn The Thunderbird with even more power! The Thunderbird 1700 comes standard with the new big bore kit. Took the following “production” measurements – wheelbase = 47. Example – a sportster chopper probably should have a trail a touch over 4″ . 34mm. When all else remains the same, this alters the trail of the bicycle. 5 degrees) A bicycle wheel, with its positive trail, acts as a caster. The Honda CB-750 K3 we tested late in 1973 averaged 45 mpg, and would—at that rate of consumption—travel 202 miles before running out of everything but fumes. The 5 degree trees will bring the trail back closer to stock. “The painful truth is that single crown forks flex more than dual crown forks (a greater problem as you rake out the head angle) and we can compensate for this, and the subsequent nervous steering, by reducing offset, increasing trail and calming that steering down.


What are my - Answered by a verified Motorcycle Mechanic I understand the premise - increased rake reduces trail which changes the stearing arch etc. Decades upon decades of racing, riding and building suspension has taught us plenty about how a motorcycle works. Larger values of trail also create more straight line stability. The calculator says that with 22 rake and ground to front wheel pinion height of 12. Trail will be higher than normal, but may not be too bad, check it on the calculator first though. Trees You will often hear the terms "Rake" and "Trail" when reading about bike steering and every builder and rider should understand how these factors affect steering. 25” and plugged these dimensions into the “RB Racing Professional Rake and Trail Calculator”. What is Trail? Trail is the horizontal distance between your bike's steering axis and the center of the front tire's contact patch. That is too much.


The study of For more information on determining proper fork length and rake, just enter the search terms "Rake and Trail Calculator". More rake does two things: one, it makes the wheelbase longer, and two, it generally increases a motorcycle’s trail. Steering Geometry: What is Trail? Trail is the distance the contact patch of the front tire lags behind the point where the steering axis intercepts the ground. I have a question on the rake and trail of a motorcycle. This bike just screams sportbike. I determined (with this forums help) that the tree on my '57 FLH is from a servi car. Normal trail is defined as the perpendicular distance from the steering axis to the front tire’s contact patch, and is also shown in the diagram. The Super Sport averages about 43 mpg, goes on reserve (1. Staying with shorter tubes and that much rake will give a hot low bobber, longer tubes start to make it more of a chopper in my opinion.


Before buying a cruiser quickly check on line and find out the manufacturers rake and trail figures, ignore the rake, but look at the figure for the trail, 100 mm to 120 mm will be stable and light to steer, 121 mm to 140 mm will be very stable but starting to get heavy, 141 mm to 160 mm really will be heavy unless you have very wide bars i always thought trail was the differance between the center line of steering head and center line of forks? moving the forks farther up in the trees does nothing to change the differance between the 2 center lines but it does change the angle the front end is sitting at if the rear is left unaltered;) just like dropping the rear without lowering front end puts front end at steeper angle. And follow the Caster/Rake through to the ground. I notice that the girder has an alternative set of holes to move the pivot point of the botXXXXX XXXXXnkage so that the entire front end can be moved back (slightly less rake, slightly higher neck I assume). RAKE RADIUS NORMAL TRAIL This file calculates a motorcycle's mechanical trail and normal trail based on inputs of rake, offset and front tire radius. Hit the Trail …at the tires on the average utility trailer and you will probably find a mix of old car tires, light truck tires, even motorcycle tires. " Other aspects Edit Bicycle and motorcycle geometry's wiki: Bicycle and motorcycle geometry is the collection of key measurements (lengths and angles) that define a particular bike configuration. While the rake of the front fork is important from a styling point of view, the cornering and stability characteristics of a bike are governed by the rake of the centerline of the steering neck of the frame in combination with the trail of the front wheel. Geometry . The American Suspension Bolt on Neck rake and trail geometry is calculated to handle perfectly on the road.


A motorcycle that is designed with a small rake and trail, and generally does not include accessories such as a windshield, saddlebags, trunk or audio entertainment system. One of the most common modifications to our bikes is to lower the rear end. The concepts of rake and trail are some of the most important factors when determining the handling of a motorcycle or trike. 6”, rear tire dia = 24. The software would then diagram either or both setups (overlayed) so you can get an vague idea of stance, etc. EDIT correction( 3. Motorcycles and trikes both use a certain amount of rake and trail to ensure proper handling and steering response. Trail is the fore-and-aft distance between the pivot axis of the fork and the center of the contact patch of the front tire Download Your Own Calculator: If you are looking to build that custom bike, then one of the first things you want to do is determine the correct trail for your motorcycle. Where raked triple trees come in handy is if you increase the rake of your frame, the trail increases, making it track straight, but more resistant to turning.


We will have to adjust the rake. Trail: Distance defined by vertical line from axle to ground and intersect of centerline of steering neck and ground. 8 inche trail) Offset not given. 37 inches, this would bring my trail back to 4. FLH models 6. This equation is still being developed. I can use a right triangle calculator (because I suck at math) to figure out how long a front end to order, but we also have to worry about the trail. Billy, If you recall, when I made the welded-up tripleclamps for my 250R, I kept the factory rake built into the tripleclamps, and went from trailing-axle to leading-axle, which was a big mistake. “There’s no substitute for slack head angles,” Chris says.


As if the looks weren’t enought, the performance of the R6 is simply amazing. Davis We will look at two things that result from the fact that your front forks are not pointing straight down - that is, there is a rake angle to those forks: how counter-steering is initiated and how weave and wobble are diminished. Kelley Blue Book regularly updates its motorcycle values to give consumers the pricing Well, fork rake is only one ingredient in the steering equation. Rake is the angle of the steering stem that holds the frame and front end together as a pivot point. Rake affects trail but rake is also an independent function . What is the proper shock and fork legnth for a trackmaster? There is a flat track in SC now and I'd love to try it. motorcycle rake and trail calculator

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