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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.
Rear Suspension Spring Pre-Load
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)
(1) lock nut (3) pin spanners
(2) adjusting nut (4) spring length
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.
(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)
102 Adjustments for Competition
Rear Suspension Adjustments
(1)
(2)
(4)
(3)
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