146
Adjustments for Competition
Rear Suspension Adjustments
Setting the proper race sag (ride height) is very
important for competition use.
Race sag refers to the amount of rear wheel travel
used by your CRF at rest, ready to ride, with you
on the seat. As a general rule of thumb, the race sag
dimension should be about one-third of the
maximum travel.
On your CRF, ride height is changed by adjusting
the rear suspension spring pre-load.
Spring Pre-load & Race Sag Adjustment
The following adjustment procedure establishes
the correct starting point for any suspension tuning
— the proper rear suspension spring preload
adjustment for your specific needs.
Your CRF should be at normal racing weight,
including fuel, oil and coolant. You should be
wearing all your normal protective apparel. You
will need two helpers.
To calculate the proper adjustment, it is necessary
to measure between two fixed points — from the
center of the seat mounting bolt to the center of the
chain adjuster lock nut as illustrated here — for
two different situations:
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.
Rear Suspension Race Sag
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
31MKE710.book 146 ページ 2019年3月11日 月曜日 午前10時47分
Содержание CRF450X 2020
Страница 1: ...Black Pantone 186C CRF450X L PRINTED IN XXXX XXXX 2019 XX L 00X31 MKE 7100 31MKE710 2020 2020 CRF450X ...
Страница 8: ...31MKE710 book 8 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 14: ...Safety Labels 6 Motorcycle Safety 31MKE710 book 6 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 26: ...18 Before Riding 31MKE710 book 18 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 36: ...28 Basic Operating Instructions 31MKE710 book 28 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 146: ...138 Servicing Your Honda 31MKE710 book 138 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 164: ...156 Adjustments for Competition 31MKE710 book 156 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 195: ...Consumer Information 187 31MKE710 book 187 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 199: ...Memo 191 31MKE710 book 191 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 200: ...192 Memo 31MKE710 book 192 ページ 2019年3月11日 月曜日 午前10時47分 ...
Страница 204: ...Black Pantone 186C CRF450X L PRINTED IN XXXX XXXX 2019 XX L 00X31 MKE 7100 31MKE710 2020 2020 CRF450X ...