Honda CRF250X Owner's Manual & Competition Handbook page 82

250X_060-083.qxd 08.7.3 10:11 ページ76
Piston/Piston Rings/Piston Pin
Cylinder Removal
1. Remove the cylinder bolt (1) and cylinder (2).
NOTICE
Do not let the cam chain fall into the crankcase.
Do not pry on or strike the cylinder.
(1)
(1) cylinder bolt
(2) cylinder
2. Remove the dowel pins (3) and cylinder
gasket (4).
NOTICE
Do not let the dowel pins fall into the crankcase.
(3)
(4)
(3) dowel pins
(4) cylinder gasket
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Servicing Your Honda
Piston Removal
1. Place clean shop towels in the crankcase to
keep the piston pin clips, or other parts, from
falling into the crankcase.
2. Remove the piston pin clips (1) using a pair of
needle-nose pliers.
3. Press the piston pin (2) out of the piston (3),
and remove the piston.
Under racing conditions, the piston and rings
should be replaced after 15.0 hours of running.
Replace the piston pin after 15.0 hours of running
(3)
(2)
(1)
(2)
(1) piston pin clip (3) piston
(2) piston pin
4. Spread each piston ring (4) and remove by
lifting it up at a point just opposite the gap.
NOTICE
Do not damage the piston ring by spreading the
ends too far.
(4) piston ring
(4)