Honda SH300I 2006, Manual

Page: 245 / 511

CYLINDER/PISTON
10-5
Do not damage the
piston ring by
spreading the ends
too far.
Spread each piston ring and remove it by lifting up
at a point opposite the gap.
Never use a wire
brush, it will scratch
the groove.
Clean carbon deposits from the ring grooves with a
ring that will be discarded.
CYLINDER/PISTON INSPECTION
CYLINDER
Inspect the cylinder wall for scratches or wear.
Measure the cylinder I.D. at three levels in the X and
Y axis. Take the maximum reading to determine the
cylinder wear.
Calculate the taper and out-of-round at three levels
in the X and Y axes. Take the maximum reading to
determine both measurements.
The cylinder must be rebored and an oversize pis-
ton/piston rings fitted if the service limits are
exceeded.
The following oversize pistons/piston rings are
available:
The piston-to-cylinder clearance for the oversize pis-
ton must be 0.010 – 0.040 mm (0.0004 – 0.0016 in).
SERVICE LIMITS: 72.045 mm (2.8364 in)
SERVICE LIMITS:
Taper: 0.05 mm (0.002 in)
Out-of-round: 0.05 mm (0.002 in)
0.25 mm (0.010 in)
0.50 mm (0.020 in)
X
Y
TOP
BOTTOM
MIDDLE