Yamaha MZ250, Service Manual, Page: 82 / 118

3-48
ENG
PISTON, CAMSHAFT, CRANKCASE, AND
CRANKSHAFT
1
2
a
b
6. Install:
9
Connecting rod cap
1
9
Connecting rod cap bolts
2
Connecting rod cap bolt:
Refer to “TIGHTENING TORQUES”
in the Supplementary service
manual.
TIP
9
Make sure that the “ ” mark
a
on the con-
necting rod is aligned with the “ ” mark
b
on the connecting rod cap.
9
Tighten the connecting rod cap bolts alter-
nately two to three times.
7. Install:
9
Camshaft
(Refer to “INSTALLING THE VALVE
LIFTER AND CAMSHAFT” on 3-36)
9
Crankcase cover
( R e f e r t o “ I N S TA L L I N G T H E
CRANKCASE COVER” on 3-37)
a
SELECTING THE CRANKSHAFT SHIM
(P.T.O. SHAFT TYPE E)
1. Measure:
9
Crankshaft free play
a
Out of specification
→
Adjust.
Crankshaft free play:
Refer to “SPECIFICATIONS” in
the Supplementary service
manual.
2. Calculate
9
Shim thickness
TIP
For example, if the free play is 0.4 mm (0.016
in), install a 0.30 mm (0.012 in) shim on the
crankshaft so that free play is 0.1 mm (0.004
in).