Piston Removal; Piston Ring Removal; Cylinder Inspection - Honda CRF450X 2005 Service Manual

CYLINDER/PISTON
PISTON REMOVAL
Places clean shop
Remove the pist on pin clips with pliers.
towel ovef the
Press the piston pin out of the piston and remove
the piston.
crankcase to
prevent the clip
from falling into the •
Under racing conditions, the piston and piston
rings should be replaced according to the com-
petition maintenance schedule (page 4·6).
crankcase.
PISTON RING REMOVAL
Do
nor
damage the
Spread the piston rings and remove them by lifting
piston ring by
up at a point just opposite the gap.
spreading the ends
/00
faf.
10-6
CYLINDER INSPECTION
Inspect the cylinder bore for wear or damage.
Measure the cyl inder tD. in the X and Y axes at
three levels.
Take the maximum readi ng to determine the cylin-
der wear.
SERVICE LIMIT: 96.025 mm (3.7805 in)
Calculate the cylinde r-to-piston clea ran ce.
Take a maximum reading to determine the clear-
ance.
For piston 0.0. (page 10-7).
SERVICE LIMIT: 0.085 mm (0.0033 in)
Calculate the taper and out-of·round at three levels
in the
X
and
Y
axes. Take the maximu m reading to
determine the cylinder condition.
SERVICE LIMITS:
Taper: 0.010 mm (0.0004 in)
Out-oJ-round: 0.010 mm (0.0004 in)
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