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Honda 2004 CRF250X Service Manual

Honda 2004 CRF250X
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REAR WHEEL/SUSPENSION
SERVICE INFORMATION
GENERAL
AWARNING
Use
only
nitrogen to pressurize the shock absorber. The use
of
an unstable gas can cause a
fire
or
explosion resulting
in
serious
inj
ury.
The shock
absorber
contains
nitrogen
under
high
pressure. Do
not
allow
fire
or
heat
near
the
shock
absorber
.
Before disposal
of
the
shock absorber, release
the
nitrogen
by
pressing the
valve
core. Then
remove
the
valve
from
the shock absorber.
Keep grease
off
of
the brake pads and disk.
A
contaminated
brake disk
or
pad reduces
stopping
power.
Discard
contaminated
pads
and clean a
contaminated
disk
with
a
high
qual
ity
brake
degreasing
agent.
When
selVicing
the
rear
wheel,
support
the
motorcycle
using
a
safety
stand
or
hoist.
For
optimum
suspension
performance
and linkage
component
service life,
the
swinga
rm and shock linkage
pivot
bear-
ing
(along
with
related seals
and
bushings)
should
be disassembled, cleaned, inspected
for
wear
and
lubricated
with
multi-purpose
grease NLGI No.2 (
molybdenum
disulfide
additive)
every
three
races
or
7.5
hours
of
operation.
Optional rear
wheel
sprockets,
drive
chain, shock
springs
and
spring
preload
pin
spanners are available. Refer
to
gen-
eral
information
(page 1-30\.
For brake system
information
(page 15-3).
Use
genuine
Honda
replacement
bolts
and
nuts
for
all
suspension
pivot
and
mounting
points.
SPECIFICATIONS
Unit·
mm
(in)
ITEM STANDARD SERVICE LIMIT
Cold
tire pressure 98
kPa
(
1.0
kgf
/cm',
14 psi)
Axle
runout
0.
20
(0.008)
Wheel
rim
runout
Radial
2.0 (0.08)
Axial
2.0 (0.08)
Wheel
hub-to-rim
distance 45.5 ± 1.00 (1.79 ± 0.039)
Drive chain slack
25
35
(1.0
1.4)
60
(2.
4)
Drive chain sizellink
DID
520MXV
-
116
Drive chain
slider
thickness
-
5.0 (0.2)
Drive cha in
roller
1.0.
'04,
'05
Upper
- 29(1.1)
Lower
39(1.5)
After
'OS
Upper
29 (
1.1
)
Lower
31
(1.2)
Shock absorber
Damper
gas pressure
981
kPa
(10.0 kglcm , 1
42
psi)
Damper
compressed
gas
Nitrogen
gas
-
Damper
rod
compressed
force
at
9
mm
compressed
20.0 - 24.0
kgf
(44
.1
- 52.9 Ibf) -
Spring
'04, '05 254.4 (10.02)
installed
length
After
'OS
256.6 (10.10) -
(standard)
High speed
compression
damping
'
04
, '05 1-7/12
2-1
/12
turns
out
from
full in
adjuster standard
position
After
'05 1-
314
2-1
/4
turns
out
from
full in
Low
speed
compression
damping
adjuster
standard
12 clicks
out
from
full in -
position
- Rebound
damping
adjuster standard
'04,
'OS
13 16 clicks
out
from
full
in
I
position
'OB
,
2-=15clicks
out
from
full
in
,
j
After
'06 10 13 clicks
out
from
full in
1
14-3

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Honda 2004 CRF250X Specifications

General IconGeneral
Engine Type249cc liquid-cooled single-cylinder four-stroke
Bore x Stroke78.0mm x 52.2mm
Compression Ratio12.5:1
InductionKeihin 37mm flat-slide carburetor
Transmission5-speed
Final DriveO-ring-sealed chain
Front Suspension47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Rear SuspensionPro-Link Showa single shock with spring preload, 17-position rebound damping adjustability, and compression damping adjustment separated into low-speed (13 positions) and high-speed (3.5 turns); 12.4 inches travel
Front BrakeSingle 240mm disc with twin-piston caliper
Rear BrakeSingle 240mm disc
Front Tire80/100-21
Rear Tire100/100-18
Rake (Caster Angle)27.5°
Trail113mm (4.4 inches)
Wheelbase58.3 inches
Seat Height37.7 inches
Ground Clearance13.4 inches
IgnitionCD with electronic advance

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