Suzuki Madura GV700GL Service Manual page 64

VALVE STEM END CONDITION
Inspect the valve stem end face for pitting and
wear. If pitting or wear of the stem end face are
present, the valve stem end may be resurfaced,
providing that the length
CD
will not be reduced to
less than 3.3 mm (0.13 in). If this length becomes
less than 3.3 mm (0.13 in), the valve must be
replaced. After installing a valve whose stem end
has been ground off as above, check to ensure
that the face ®of the valve stem end is above
the cotters
@.
VALVE SPRINGS
• 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 mecha-
nism.
• Check the springs for strength by measuring
their free lengths and also the force required to
compress them. If the limit indicated is exceed-
ed by the free length reading or if the measured
force does not fall within the range specified,
replace with a SUZUKI spring.
CAUTION:
Replace both of the valve springs, inner and
outer, at a time, if any one of these is found
to be beyond the limit.
Valve spring free length
Spring Service Limit
INNER 31.7 mm (1.25 in)
OUTER 35.5 mm (1.40 in)
Valve spring tension
Spring Standard
INNER
5.1-6.1 kg/28 mm
(11.2- 13.5 lbs/1.10 in)
OUTER
11.5- 13.3 kg/31.5 mm
(25.4- 29.3 lbs/1.24 in)
ENGINE SERVICING 3-34
5.1 - 6.1 kg ( 11.2 - 13.5 lbs)
0