Suzuki RM-Z250 Service Manual page 104

6-10 CYLINDER HEAD, CYLINDER AND PISTON
CAM WEAR
• Measure the cam height H using the micrometer.
• Replace a camshaft if the cams are worn to the service limit.
 Cam height H
Service Limit IN.: 34.48 mm (1.357 in)
EX.: 33.64 mm (1.324 in)
 09900-20202: Micrometer (25 – 50 mm)
CAMSHAFT JOURNAL WEAR
• Determine whether or not each journal is worn down to the
limit by measuring the oil clearance with the camshaft
installed in place.
• Use the plastigauge to read the clearance at the widest por-
tion, which is specified as follows:
 09900-22301: Plastigauge (0.025 – 0.076 mm)
09900-22302: Plastigauge (0.051 – 0.152 mm)
• Tighten the camshaft journal holder in ascending order of
numbers to the specified torque. (6-32)
 Camshaft journal holder bolt:
NOTE:
Do not rotate the camshaft with the plastigauge in place.
• Remove the camshaft journal holder, and read the width of
the compressed plastigauge with envelope scale. This mea-
surement should be taken at the widest part.
 Camshaft journal oil clearance:
Service Limit (IN. & EX.): 0.150 mm (0.0059 in)
10 N·m (1.0 kgf-m, 7.0 Ibf-ft)