Valve Springs - Suzuki EN125-2A Service Manual

3-19 ENGINE

VALVE SPRINGS

Check the springs for strength by measuring their
free lengths and also the force required to
compress them. If the limit indicated below is
exceeded by the free length reading or if the
measured force does not fall within the range
specified, replace with a new spring as a set .
Valve spring free length
Spring
INNER
OUTER
Valve spring tension
Spring
INNER
OUTER
CYLINDER DISTORTION
Check the gasketed surface of the cylinder for
distortion with a straightedge and thickness gauge,
taking a clearance reading at several places as
indicated. If the largest reading at any position of
the straightedge exceeds the limit, replace the
cylinder.
Service limit
CYLINDER BORE
Measure the cylinder bore diameter at six places.
If any one of the measurements exceeds the limit,
replace the cylinder.
Cylinder gauge set
Service limit
Service limit
31.2 mm
33.6 mm
Standard
3.77 4.43 kg/26.78 mm
8.86 10.4 kg/29.78 mm
0.05 mm
09900-20508
57.085 mm
3.77-4.43 kg
26.78 mm