Honda CB350 Repair Manual page 62

ENGINE AND TRANSMISSION 57
stem is smaller than. the —service—limit, it
should be replaced.
NOTE: A new valve should always be
lapped into its seat.
12. Inspect.the—end=of the —valve=stem
fora pit mark.caused by the rockerarm. A
small mark can be removed with an oil—
stone, howeverif much metal must be re—
moved to obtain a flat surface, the valve
must be replaced. Some valves are stel—
lite—tipped. Grinding the stem to remove
any identation is not recommended.
NOTE: An indentation in the end of
the valve stem will cause a false (low)
reading when trying to adjust the
valve clearance using a feeler gauge.
When installing a new valvait is rec—
ommended that the valve guide also be
replaced.
13. A quick check=of
worthiness of a valve guide.can be done
by pouring a small amount of motoroil on
the valve stem and inserting it into its
guide. Hold your finger over the end of
the valve guide and pull the valve out
until about % in. of the stem is left in the
guide. .When is released—it
should be pulled back into —the guide —by
suction.
14. If a dial gauge is available, the
valve—to—valve "guide clearance can be
cogting the valve stem with
oil and inserting it into the valve guide
Checking for a worn valve guide
backwards, holding it about 1 in. out of
the guide. Set the dial gauge on the head
of the valve and measure the movement
in two directions. If clearance exceeds
the specification given for your model,
the guide is probably worn and should be
replaced.
15. If the guides are worn, drive them
out with a suitable drift. Replace with an
oversized valve guide. The new guide
must be installed straight in its seat. On
360 models, a new valve guide clip
should be used. After driving in a new
guide, it must be reamed to the proper
specification.
NOTE: After installing new valve
guides, the valves must be lapped into
their seats.
Valve springs must be installed with the close coils
toward the head
16. "Install"the valve fnto.its.seat—after
coating—the_stem with—engine oil. Install
spring seat and oil seal (360). Install the
inner and outer valve springs with the
close..coils—=—of —both=—springs—facing.down
(toward the head). Springs are progres—
sively wound. Compress the springs with
a valve spring compressor so that the
keepers may be installed. Do not
compress the springs more than is neces—
sary to install the keepers, to do so may
damage the valve guide or the oil seal
(360).