Cylinder Inspection - Honda CRF110F Service Manual

Do
not damage
the
pis/on ring by
spreading the ends
100
f8r,
Never use
8
wire
brush;
it
win
damage the glOOvs.
Spread each piston ring and remove
it
by lifting it up al
a pOint just opposite the gap.
CYLINDER/PISTON
Clean carbon deposits from the piston ring grooves [1
J
~======~~~=~~~~~~~~
with a used piston ring 12J thai will
be
discarded .
Blow the oil passage with compressed air, if necessary.
INSPECTION
CYLINDER
Inspect the cylinder walt for scratches and wear.
Measure and record the cylinder 1.0. al three levels in
both the X and Y axis. Take the maximum reading to
determine the cylinder wear.
SERVICE LIMIT: 50.05 mm (1.970 in)
Calculate the cylinder-to-piston clearance.
For measurement of the piston 0.0. (page 9-6).
SERVICE LIMIT: 0.10 mm (0.004 In)
Calculate the cylinder for taper and out-of-round at
~=====~~~~~~~~====l
three levels in an X and Y axis. Take the maximum
y
reading to determine the taper and out-of-round. _ - _ _
SERVICE LIMITS:
Out-of-round : 0.10 mm (0.004 in)
Taper: 0.10 mm (0.004 In)
The cylinder must be raborad and an oversize piston
fitted
if
the service limits are exceeded.
TOP
MIDDLE
BOTTOM
x
"
----
--
9-5