Rear Suspension Adjustments - Honda CRF250X Owner's Manual & Competition Handbook

250X_104-129.qxd 08.7.3 15:15 ページ120

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 Honda 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 Honda dealer or a qualified mechanic,
equipped with the proper tools, safety equipment
and the Honda Shop 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.
Rear Suspension Spring Pre-Load
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 38.
120
Adjustments for Competition
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 1.5 mm (0.06 in).
4. After adjustment, hold the adjusting nut and
tighten the lock nut to the specified torque:
44 N·m (4.5 kgf·m, 32 lbf·ft)
(3)
(1)
(2)
(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 spanner
(3) and turn the adjusting nut to shorten the
spring length (4). Do not shorten to less than:
243 mm (9.6 in)
To decrease spring pre-load:
Loosen the lock nut with the optional pin spanner
(3) and turn the adjusting nut to increase the
spring length (4). Do not increase to more than:
257.6 mm (10.14 in)
Each turn of the adjuster changes spring length
and spring pre-load. One turn equals: spring
length/spring pre-load:
1.5 mm (0.06 in) / 7.2 kg (15.9 lbs)
Pin spanners should be used for turning the lock
nut and adjusting nut. See page 159 for optional
pin spanners.
Spring pre-load length (Standard spring)
Standard: 256.6 mm (10.10 in)
Min. : 243 mm (9.6 in)
Spring pre-load length (Optional spring)
Min. (Softer, 44.6 N/mm (254.7 lbf/in)):
246 mm (9.7 in)
Min. (Stiffer, 49.0 N/mm (279.8 lbf/in)):
246 mm (9.7 in)
(4)