Honda Motorcycle Service Manual page 161

CYLINDERIPISTON
Measure and record the piston O.D.
90°
to the piston pin bore
and at the point specified in the Model Spectific manual, near
the bottom of the piston skirt.
Replace the piston if the service limit is exceeded.
Calculate the piston-to-cylinder clearance (see page 10-5).
Measure the piston pin bore I.D. in an X and Y axis. Take the
maximum reading to determine the I.D.
Replace the piston if the I.D. is over the service limit.
Inspect the piston rings. and replace them if they are worn.
NOTE
Always replace piston rings as a set.
Reinstall the piston rings (see page 10-8) into the piston
grooves.
Push
in
the ring until the outer surface of the piston ring is
nearly flush with the piston and measure the clearance using a
feeler gauge. Replace the piston ring if the service limit is
exceeded.
PISTON RING
I
Insert the piston ring into the bottom of the cvlinder souarelv.
1
using the piston as shown.
"
/
Measure the end gap using a feeler gauge. Replace the ring If
the service limit is exceeded.
FEELER
Date of Issue: Nov.. 1989
O
HONDA MOTOR CO., LTD.