Honda CB350 Repair Manual page 68

ENGINE AND TRANSMISSION 63
between the top ofthe ring and the top of
the ring groove and check that the clear—
ance is within the specification given at
the end ofthis chapter for your machine.
If the clearance is too large, the rings or
grooves are worn. If too small, metal may
have been pushed into the grooves due to
a piston seizure. Check that the grooves
are not just carboned up before replacing
the piston. If new rings do not bring the
clearance to the proper value, the piston
must be replaced.
2. To remove the rings from the piston,
spread the ends gently with the thumbs
Square the ring in the bore with the bottom of the
piston
while lifting the opposite side up and off
the piston or use a ring removal/installa—
tion tool. Decarbonize the ring grooves
with a piece of broken ring or with a very
small screwdriver.
3. To check the ring end—gap, ensure
first that the cylinder bore is not exces—
sively worn. Place each ring, in turn, into
s the bottom ofthe cylinder and push it in
Removing A ring about an inch using the piston crown to
Insert each ring into the bottom of the bore to
check ring end—gap Checking ring end—gap