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Rear Suspension Adjustments
120 Adjustments for Competition
Rear Suspension Adjustments
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
dealer or a qualified mechanic, equipped with the
proper tools, safety equipment and the Honda
Service Manual.
If your CRF is new, put enough part-throttle break-
in time (about one hour) on it to ensure that the
suspension has worked in.
Pre-load should be adjusted when the engine is
cold because it is necessary to remove the muffler
(page 62).
An optional pin spanner is available for turning the
lock nut and adjusting nut to adjust spring pre-
load.
1. Place your CRF on an optional workstand or
equivalent support with the rear wheel off the
ground.
2. Loosen the connecting tube clamp screw and
subframe mounting upper bolt, and remove the
rear subframe mounting lower bolts, then lift
the subframe. See page 39.
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 adjusting 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:
9.6 in (243 mm)
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:
10.14 in (257.6 mm)
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)/15.9 lbf (70.6 N)
Pin spanners should be used for turning the lock
nut and adjusting nut. See page 163 for optional
pin spanners.
Spring pre-load length (Standard spring)
Standard :10.10 in (256.6 mm)
Min. : 9.6 in (243 mm)
Spring pre-load length (Optional spring)
Min. (Softer, 254.7 lbf/in (44.6 N/mm)):
9.7 in (246 mm)
Min. (Stiffer, 279.8 lbf/in (49.0 N/mm)):
9.7 in (246 mm)
Rear Suspension Spring Pre-Load
(1) lock nut (3) pin spanners
(2) adjusting nut (4) spring length
(1)
(2)
(4)
(3)
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