Camshaft Runout; Cam Chain 20-Pitch Length; Cylinder Distortion; Cylinder Bore, Piston Diameter - Suzuki DR350 Service Manual

3-23 ENGINE
CAMSHAFT RUNOUT
Measure the runout with a dial gauge. Replace the camshaft
if the ru n out exceeds the limit.
Service limit : 0 .10 mm (0 .004 in)
09900· 20701 : Magnetic stand
09900·20606 : Dial gauge 11 / 100 mm}
CAM CHAIN 20-PITCH LENGTH
Pull the ch ain tight to remove any slack, then using venier
calipers. measure the 20-pitch (2 1 pins) length o f cam chain.
If it
measures more th an the limit replace the cam cha in .
Service Limit : 128.9 mm (5 .07 in)
CYLINDER DISTORTION
Check the gasketed su rface of the cylinder for distortion w ith
a straightedge and thickness gauge, taking a clearance read-
ing at severa l places as indicated . If the largest reading at
any pasitan of the straightedge exceeds th e limits. repl ace
the cylinder .
Service limit : 0 .05 mm (0 .002 in)
CYLINDER BORE
Measure the cylinder bore diameter at six places . If anyone
of the measurements exceeds the limit. overhaul the cylinder
and replac e the piston wi t h an ove rsize. or replace th e
cylind er.
Service Limit : 79 .075 mm (3.1132 in)
09900·20508 : Cylinder gauge set
PISTON DIAMETER
Using a micrometer, measure the piston ou t side diameter
at the place 15
mm (0.6 in) from the
skirt end as shown
in Fig. If the measurement is less than limit, repla ce the
piston .
\
Service Limit : 78 .880 mm (3 .1055 in)
Piston oversize : 0 .5 . 1 .0 mm
09900-20204 : Micrometer (75 - 100 mm)
I
15 min
*
10. 6 inl