Rake (also called caster) is the angle of a motorcycle’s steering head of the frame (A). Choppers have a lot of rake—their forks stick way out in front. Sportbikes have much less—their forks are closer to vertical. … Too much trail makes a motorcycle difficult to turn; too little makes it unstable.
How do you measure a motorcycle rake angle?
Raise the bike to an upright position, using a tape measure, hold the tape straight down from the front axle to the floor. Put a mark on the floor at that point. Then place the tape parallel to the steering neck, following the angle of the steering neck all the way up to the floor. Put a mark here also.
What is a good lean angle on motorcycle?
If I use a coefficient of 0.7, this would give a lean angle of 35 degrees. However, racing motorcycles can lean over 60 degrees.
What is rake and stretch on a motorcycle?
Stretch and Rake:
This repositioning may be done to change the handling characteristics of the motor-cycle, fit the frame to the rider, or more often than not, to give the motorcycle a particular look, i.e. long and low or a high neck.
How can I improve my motorcycle rake?
Sliding the forks down in their clamps to give them a shallower angle relative to the pavement increases rake and trail, as does installing a shorter rear shock to lower the back of the bike. Rake and trail changes can also be made inadvertently.
How does rake affect motorcycle handling?
The smaller the rake angle, the less effort is required to turn the steering. Though, the motorcycle will be less stable in a straight line. Conversely, a larger rake angle requires more effort to turn but tends to make the motorcycle more stable at high speeds and helps maintain a straight course.
How does rake affect car handling?
1) When you change rake, you are moving a VERY SMALL amount of weight. That has almost no effect on handling. 2) When you change ride height (rake) you are moving the roll center and CG. If you started at the ideal point for front and rear grip, changing the roll center reduces grip on that end.
Do you lean into a turn on a motorcycle?
Motorcycles turn by leaning, you make a motorcycle lean by pressing on the grip in the direction you want to go. Press the left grip – lean left – turn left, press the right grip – lean right – turn right.
How far can you safely lean a motorcycle?
You can lean until pieces start grinding off. For cruisers, that can be 30º or less, but sport bikes can easily exceed 45º. It takes skill, which takes practice, and it takes a fair bit of faith in your tires – which also comes with experience. Sign up for some track days, and go learn to lean.
Why do motorcyclists lean into a corner?
A cyclist must lean into a turn to prevent tipping over in the other direction. … Turning on a bike requires a net force called centripetal force. The frictional force provides the centripetal force necessary to turn the cyclist to the left.
What’s the point of stretching a motorcycle?
Stretching a sportbike lowers its stance, which can be further lowered by additional suspension modifications. A lowered stance improves traction, meaning less power is wasted and more power is available to push the bike forward.
What is the difference between rake and trail?
Rake (also called caster) is the angle of a motorcycle’s steering head of the frame (A). … 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.
What is the trail on a motorcycle?
Trail, or caster, is the horizontal distance from where the front wheel touches the ground to where the steering axis intersects the ground. The measurement is considered positive if the front wheel ground contact point is behind (towards the rear of the bike) the steering axis intersection with the ground.
Does lowering a motorcycle affect the handling?
Effects on Handling
Even if you lower your bike by the book, handling can be affected to some degree. “When you lower a bike, you also lower its center of gravity, so it’ll handle a bit better in certain circumstances,” says Langley. “The negative is that your initial ground clearance is decreased.
How does trail affect bike handling?
Trail is a combination of the head tube angle and the fork rake and can be thought of as the tyre contact point trailing behind the steering axis. The short explanation is a small amount of trail equals a ‘fast’ handling bike, while greater trail equals a ‘slow’ handling bike.
Why do choppers have long forks?
They’re there to specifically limit the side to side travel of the front wheel in turns (and also limit just how tight you can turn) to keep the front wheel from flopping over.