Honda 2004 CRF250X Service Manual

CYLINDER/PISTON
CYLINDER REMOVAL
Remove the cylinder head (page 8- 12).
Remove the bolts, cam chain
tensioner lifter and
gasket.
Remove the
mounting bolt and cylinder .
Prevent the cam Remove the dowel pins and gasket.
chain from the
falling into the
crankcase.
PISTON REMOVAL
Place a clean shop Remove the piston pin clips with pliers.
towel over the
crankcase
to
prevent the clips
from fallmg the
cran/ccase.
PiS ton rings are
easily broken; take
care not to damage
them during
removal.
9-4
Press the piston pin out of the piston and remove
the piston.
•
Under racing conditions, the piston, piston r ings
and piston pin should be replaced according to
the maintenance schedule (page 3-6).
Spread the piston rings and remove them by lifting
up at a point just opposite the gap.
,

Honda 2004 CRF250X Specifications

General

Engine Type	249cc liquid-cooled single-cylinder four-stroke
Bore x Stroke	78.0mm x 52.2mm
Compression Ratio	12.5:1
Induction	Keihin 37mm flat-slide carburetor
Transmission	5-speed
Final Drive	O-ring-sealed chain
Front Suspension	47mm inverted Showa cartridge fork with 16-position rebound and 16-position compression damping adjustability; 12.4 inches travel
Rear Suspension	Pro-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 Brake	Single 240mm disc with twin-piston caliper
Rear Brake	Single 240mm disc
Front Tire	80/100-21
Rear Tire	100/100-18
Rake (Caster Angle)	27.5°
Trail	113mm (4.4 inches)
Wheelbase	58.3 inches
Seat Height	37.7 inches
Ground Clearance	13.4 inches
Ignition	CD with electronic advance