Honda 2004 CRF250X Service Manual

CYLINDER HEADIVALVES
CYLINDER COMPRESSION TEST
Remove the fuel tank (page 2-7).
Warm up the engine .
Stop the engine and remove the spark plug .
Connect a compression gauge.
Makesurethe Open the throttle all the way and crank the engine
compressIOn gauge with the starter motor until the gauge reading stops
connection does rising. The maximum reading is usually reached
not leak. within 4 - 7 seconds.
COMPRESSION: 392 kPa (4.0 kg /c m 2, 57 psi)
at 800 rpm
L ow compression can be ca used by :
-
Improper valve adjustment
- Valve leakage
- Bl own cylinder head gasket
- Worn piston ring or cylinder (page 9-5)
High
compression can be caused by:
- Carbon deposits in combustion chamber or on
piston head
- Faulty decompressor cam
CYLINDER HEAD COVER REMOVAL
8-6
Remove the fuel tank (page 2-7).
Remove the direct
ignition coil.
Disconnect the crankcase breather hose.
Remove the
bolts, cylinder head cover and packing.

Honda 2004 CRF250X Specifications

General

Brand	Honda
Model	2004 CRF250X
Category	Motorcycle
Language	English