Valve Stem End Condition; Valve Springs - Suzuki Katana 1100 Service Manual

3-25 ENGINE
VALVE STEM END CONDITION
CAUTION:
*
Refacing valve stem end face is permissible where the
length
CD
will not be reduced to less than 2.5 mm. If this
length becomes shorter than 2.5 mm, then the valve must
be replaced.
*
After installing the valve whose stem end has been
ground off as above, check that the face
®
of valve stem
end is above the valve cotter
0.
VALVE SPRII\lGS
The force of the two coil springs keeps the valve seat tight.
Weakened springs result in reduced engine power output, and
often account for the chattering noise coming from the valve
mechanism.
Check the valve springs for proper strength by measuring their
free lengths and also by the force required to compress them.
If the spring length is less than the service limit, or if the force
required to compress the spring does not fall within the range
specified, replace both the inner and outer springs as a set.
CAUTION:
Replace both the valve springs, inner and outer, at a time,
if anyone of these is found to be beyond the limit.
Valve spring free length
INNER: 35.0 mm (1.38 in)
Service Limit
OUTER: 37.8 mm (1.49 in)
Valve spring tension
INNER: 5.3 - 6.5 kg/28 mm
53 - 6.5 kg
,[}
Standard (11.7 - 14.3 Ibs/1.10 in)
OUTER: 13.1 - 15.1 kg/31.5 mm
(28.9 - 33.3 Ibs/1.24 in)