Loading ...
Loading ...
Loading ...
Adjustments for Competition 151
Rear Suspension Adjustments
unloaded: motorcycle on an optional workstand
with rear suspension fully extended, no rider.
loaded with rider: motorcycle on ground, with
rider.
1. Support your CRF on an optional workstand
with the rear wheel off the ground.
2. Measure the unloaded dimension.
3. Measure the loaded with rider dimension.
Remove the workstand. With two helpers
available, sit as far forward as possible on your
CRF’s seat, wearing your riding apparel.
Ask one helper to steady your CRF perfectly
upright so you can put both feet on the pegs.
Bounce your weight on the seat a couple of
times to help the suspension overcome any
situation and settle to a good reference point.
Ask the other helper to measure the loaded
with rider dimension.
Example:
4. Calculate the race sag dimension.
To do this, subtract the loaded with rider
dimension (step 3) from the unloaded
dimension (step 2).
Standard Race Sag: 4.1 in (105 mm)
Adjust spring pre-load as necessary to obtain
the desired handling results.
Decreasing the race sag dimension (example:
3.7 in, 95 mm) improves turning ability for
tight terrain at the cost of slightly reduced
straight line stability.
Increasing the race sag dimension (example:
4.5 in, 115 mm) may improve stability on
faster terrain with less turns, but will reduce
turning performance slightly and may upset the
balance between the front and rear suspension,
producing a harsher ride. This will happen if
the adjustment shifts the effective wheel travel
toward the more progressive end of its range.
UNLOADED MEASUREMENT
(without rider)
EXAMPLE: 24.6 in (625 mm)
SEAT MOUNTING BOLT
CHAIN ADJUSTER LOCK NUT
Unloaded = 24.6 in (625 mm)
– Loaded = 20.7 in (525 mm)
Race Sag = 3.9 in (100 mm)
LOADED MEASUREMENT
(with rider)
EXAMPLE: 20.7 in (525 mm)
SEAT MOUNTING BOLT
CHAIN ADJUSTER LOCK NUT
Loading ...
Loading ...
Loading ...