How are motorcycle rakes measured?

What is rake on a motorcycle frame?

Rake is the angle, in degrees, that the steering head of the frame—not the forks—is tilted back from the vertical. For example, the rake angle on all the Harley-Davidson Touring models is 26 degrees.

What is the trail measurement on a motorcycle?

Trail is best thought of as the tire patch “trailing” behind the steering axis. Fork offset for road bikes usually ranges from 40 to 55 mm, generating trail figures from 50 to 63 mm. 57mm of trail is considered by many to be an ideal combination of stability and agility.

What is the stock rake on a Harley frame?

“Rake” refers to the angle between the front forks and the ground or, in case we are talking about just a frame, the angle between the head tube and the ground. In most stock bikes the triple-trees hold the forks parallel to the head tube so rake is the same for the frame and the bike.

How do I get more rake on my motorcycle?

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.

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How is motorcycle rake and trail calculated?

Rake– The angle in degrees of the steering neck from the vertical. Fork Length– The distance between the top of the fork tubes to the centerline of the axle. Diameter of the front tire. Trail: Distance defined by vertical line from axle to ground and intersect of centerline of steering neck and ground.

What is the difference between rake and trail?

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 of the front wheel’s contact with the ground and a line drawn through the axis of the steering head.

What is a good lean angle on motorcycle?

For modern MotoGP bike and riders, it’s 65 degrees, which is a full 45 degrees past the 20 degrees that human beings are naturally comfortable with.

What is caster angle on a motorcycle?

The caster angle or castor angle is the angular displacement of the steering axis from the vertical axis of a steered wheel in a car, motorcycle, bicycle, other vehicle or a vessel, as seen from the side of the vehicle.

What is the rake on a bike fork?

Simply put, fork offset, or fork rake, is the distance between the front axle and the steering axis – the imaginary line running straight through the midpoint of the steerer tube. Fork offset is linked to another important measurement: trail.

How do you measure forks on a motorcycle?

Length from the center of the steering neck at top of triple clamp perpendicular to the ground. If you only have the frame, measure from center of top of steering neck perpendicular to the ground and add 1″ to this measurement. Place frame on floor and block lower frame rails at the height you want the bike to sit.

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What is triple tree on motorcycle?

. Triple Tree (“triple clamp” (US) or “yoke” (UK)) attaches the fork tubes to the frame via steering head bearings, which allow the forks to pivot from side to side, and therefore steer the motorcycle.

How does rake affect 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.