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Rear Suspension Adjustments
102
Adjustments for Competition
Refer to Safety Precautions on page 19.
The rear suspension can be adjusted for the rider’s
weight and riding conditions by changing the
spring pre-load and the rebound and compression
damping.
The rear shock absorber assembly includes a
damper unit that contains high pressure nitrogen
gas. Do not attempt to disassemble, service, or
dispose of the damper; see your dealer.
The instructions found in this owner’s manual are
limited to adjustments of the shock assembly only.
Puncture or exposure to flame may also result in an
explosion, causing serious injury.
Service or disposal should only be done by your
authorized dealer or a qualified mechanic,
equipped with the proper tools, safety equipment
and the official Honda Service Manual.
If your CRF is new, put enough part-throttle break-
in time (about 1 hour) on it to ensure that the
suspension has worked in.
An optional pin spanner is available for turning the
lock nut and adjusting nut to adjust spring pre-
load.
1. Place an optional workstand under the engine
to raise the rear wheel off the ground.
2. Remove the subframe. See page 32.
3. Check that the spring pre-load is adjusted to
the standard length. Adjust as necessary by
loosening the lock nut (1) and turning the
adjusting nut (2).
Each complete turn of the adjuster nut changes
the spring length by 0.06 in (1.5 mm).
4. After adjustment, hold the adjusting nut and
tighten the lock nut to the specified torque:
32 lbf·ft (44 N·m, 4.5 kgf·m)
To increase spring pre-load:
Loosen the lock nut with the optional pin spanners
(3) and turn the adjusting nut to shorten the spring
length (4). Do not shorten to less than:
8.7 in (222 mm).............................CRF150R
8.9 in (226 mm).......................... CRF150RB
To decrease spring pre-load:
Loosen the lock nut with the optional pin spanners
(3) and turn the adjusting nut to increase the spring
length (4). Do not increase to more than:
9.27 in (235.5 mm)........................CRF150R
9.25 in (235.0 mm)..................... CRF150RB
Each turn of the adjuster changes spring length and
spring pre-load. One turn equals: spring length/
spring pre-load:
0.06 in (1.5 mm)/16.5 lbf (7.5 kgf) ....... CRF150R
0.06 in (1.5 mm)/17.2 lbf (7.8 kgf) .....CRF150RB
Pin spanners should be used for turning the lock
nut and adjusting nut.
Rear Suspension Spring Pre-Load
(1) lock nut (3) pin spanners
(2) adjusting nut (4) spring length
(1)
(2)
(4)
(3)
(CRF150R)
Spring preload length (Standard spring)
Standard: 9.23 in (234.5 mm)
Min. : 8.7 in (222 mm)
Spring preload length (Optional spring)
Min. (Softer, 268.4 lbf/in (47.0 N/mm)):
8.8 in (223 mm)
Min. (Stiffer, 291.2 lbf/in (51.0 N/mm)):
8.9 in (226 mm)
(CRF150RB)
Spring preload length (Standard spring)
Standard: 9.21 in (234.0 mm)
Min. : 8.9 in (226 mm)
Spring preload length (Optional spring)
Min. (Softer, 279.8 lbf/in (49.0 N/mm)):
8.7 in (222 mm)
Min. (Stiffer, 302.6 lbf/in (53.0 N/mm)):
8.7 in (221 mm)
31KSE7100_NA.book 102 ページ ２０１９年４月９日 火曜日 午後１時１３分
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