42 motorcycle rake and trail diagram

Three basic measurements have an important influence on handling: wheelbase, rake angle and trail. Wheelbase is simply the distance between the front and rear axles. Rake angle, sometimes called caster angle, is the angle of the steering head (steering axis) from vertical, measured in degrees. Wheelbase and rake are readily visible when looking ... 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. Rake, trail, and offset are inter-related. As ...

Why Raked Triple Trees. The addition of a sidecar to a motorcycle invariably results in high steering effort. Trail is the reason. Trail is the factor of the bikes' steering geometry which generates a self-centering force for stability - see illustration. Trail is a virtual lever arm between the tire contact patch and the steering centerline ...

Motorcycle rake and trail diagram

Download the Motorcycle Rake and Trail Calculator here: rake_trail_calculator_v3-0.xls. Thrust Chart Thrust is a measure of actual driving force delivered to the motorcycle's rear wheel, and is calculated as torque multiplied through the primary ratio, internal transmission ratios, secondary ratio, and over the radius of the rear tire. Trail Causes Self-correction By: James R. 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. 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. “Trail” is harder to explain and the diagrams below will help clarify it. 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 ...

Motorcycle rake and trail diagram. On a sport bike, the rake might be 26°, whereas a long chopper's rake would be more like 45°. To measure trail, make a straight line down from the center of the front wheel's axle to the contact point and another line following the steering axis (drawn along the center-line of the neck), both extending to the ground. Rake and Trail 101. 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. A cycle with zero degrees of rake has a stem that is perpendicular to the ground or in other words straight up and down. Rake: The distance, from our imaginary vertical line (above the front wheel) to our diagonal fork line is rake, again see diagram, this is measured in degrees. Trail: Below the front wheel spindle, you'll notice the lines have carried onto the ground. The distance from our continued fork line to the imaginary vertical line is trail. As you can see in the (rather extreme) diagram below, dropping the triple clamps down the forks changes the angle of the forks relative to the road and in turn reduces the rake and trail. What you'll also notice is that the wheelbase shortens when you lower the front, which is one of the factors that causes the bike to feel more agile.

Motorcycle Rake and Trail Calculator Trail is defined as the distance from the point at which the steering axis intersects the ground to the front tire's contact patch, while normal trail is defined as the perpendicular distance from the steering axis to the tire's contact patch. Both are dependent on rake, offset and front tire radius. Rake is the angle of the steering stem that holds the frame and front end together as a pivot point. Trail is the relationship of steering stem rake and front axle location. When rake is added to a motorcycle, trail is often increased causing steering to become heavier. Wheel size, tire manufacturers, tire wear, and the way you have your bike mocked up can all have an effect on the actual measured rake of a motorcycle. There are a few ways to take this measurement, the cheapest and easiest way it to buy an $8 angle finder from a hardware store and set it on the front of the frame neck. Trail is defined as the distance between the centre of the front tyre's contact patch and the point where the steering axis meets the ground. (See figure 3. 1) Virtually every motorcycle and bicycle ever designed has a trail value, and this is what gives the front wheel a caster or self-centring effect when in motion.

When riding a motorcycle, the suspension travel and braking will also substantially alter the trail and rake. If you brake hard on the front, for example, the suspension will compress under dive and decrease the rake and trail, and most probably induce wobble in the machine. Front Geometry. There are 3 main areas of geometry for the front wheel. They are: Offset. Rake. Trail. Offset is the distance from the steering axis to the centre line of the front axle. Alternatively it is the distance from the steering stem to the fork centre line. The diagram below shows the offset distance of the front wheel geometry. Flop Factor = trail in inches times the sine of the rake angle times the cosine of the rake angle. The results of the exercise will give you a number (Flop Factor) that is the distance in inches the steering head of the cycle will lower as the wheel is rotated from its normal 90-degree upright angle when the forks are centered. Rake, trail, offset. These three are the most important concepts governing the rideability of any motorcycle. The offset may be absent in certain models, but where it is being used, it helps to ...

Changing your Rake & Trail on your Bagger | Bike design ...

Factors Affecting Motorcycle Handling. Handling is the property of the frame and steering angle of the motorcycle. It depends on the rake angle and trail, which in turn are decided based on the application of the motorcycle - cruiser, commuter or sports, broadly. The Offset decides the rake angle and trail of a motorcycle.

Fork Rake | Bicycling Magazine Forums

Harley-Davidson motorcyles can be raked and turned into the most radical choppers. Use this calculator to see what the chassis, rake, forks and triple clamps have to do with your magical "trail" figure. Pictured is a Big Dog K9 which has 39 degrees of rake, 3 degree raked trees, and 12" over forks. The result is 4.35" of Trail.

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In this case both the trail and the rake would be zero resulting in a wheel that has as much possibility of turning sideways as it does going straight. This is a very unstable condition for both a shopping cart and a motorcycle. Motorcycles and trikes both use a certain amount of rake and trail to ensure proper handling and steering response.

(Cog)nitive Dissonance: Low Trail!

A diagram of trail and rake is shown in FIG. 3A. The combination of trail and rake is an important factor in motorcycle handling. The present invention provides some rake increase in the adapter blocks 22 and 23, and some rake increase in the triple trees 18 and 19. The result is a preferred trail T1.

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Read enough motorcycle reviews and you’ll inevitably hear people like the MO staff talk about two things: Rake and Trail. It’s mentioned so much because rake and trail have a major role to play in the way your motorcycle handles, and the people who design these motorcycles are well aware of this when going from CAD drawing to real-life machine.

rake-and-trail - Haul N Ride

Understanding motorcycle geometry, or rake and trail, can seem confusing at first. As you study motorcycle trail, you probably think of all those high school or college math classes you skipped and wonder if you can even understand all the factors that go into a good, safe, comfortable chopper or stock motorcycle design.

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Motorcycle suspension systems can be very complex, and involve numerous variables such as wheelbase, weight, ride height, tire size, suspension sag, and engine placement, in addition to rake and ...

The three main forces acting on the bike. Rake angle and ...

More rake does two things: one, it makes the wheelbase longer, and two, it generally increases a motorcycle’s trail. Trail (B) is measured in distance (inches or millimeters) between the point ...

Explain benefits of offset triples - ducati.org forum ...

TRAIL: The distance defined by the vertical line from axle to ground and the intersection of centerline of the steering neck and ground. RAKED TRIPLE TREES: In order to bring trail figures back into line, triple trees with raked steering stems can be used. Usually adjustable in 3, 5, 7 degrees of rake. HOW TO MEASURE CORRECT TRAIL

Low Speed Wobble - Your thoughts? - Harley Davidson Forums

Motorcycle Glossary Dictionary Term - Rake and Trail. Rake and Trail: Rake is the angle of the fork away from vertical toward the rider. Trail is the distance on the ground between a vertical line dropped straight down from the center of the wheel and a projection of the fork extended until it touches the ground.

Good to know: rake and trail | Dragon Soul Studio

RB Racing's Professional Rake and Trail Calculator for motorcycles Definitions: Your front suspension geometry is defined by the following six variables which are defined as: Offset-- Centerline of top of steering neck to centerline of top of fork tubes. Rake-- The angle in degrees of the steering neck from the vertical. ...

Changing your Rake & Trail on your Bagger

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. “Trail” is harder to explain and the diagrams below will help clarify it. 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 ...

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Trail Causes Self-correction By: James R. 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.

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While on a business trip to Macon, GA, I stumbled across this alley. The alley was adorned with beautiful Edison string lights. This flat black Harley Davidson Sportster was still warm and the rich exhaust fumes could still be smelt.