Checking The Crankshaft Pin Oil Clearance - Yamaha FT50C Service Manual

POWR
7. Tighten the crankcase bolts to the speci-
fied torques in two stages and in the
sequence shown.
NOTE:
Do not move the crankshaft until the main
journal oil clearance measurement has been
completed.
Crankcase bolt (M8):
1st: 15 N·m (1.5 kgf·m, 11 ft·lb)
2nd: 30 N·m (3.0 kgf·m, 22 ft·lb)
Crankcase bolt (M6):
1st: 6 N·m (0.6 kgf·m, 4.3 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.7 ft·lb)
8. Remove the crankcase and measure the
width of the compressed Plastigauge
(PG-1) on each main journal. Replace
the main bearing if out of specification.
5-43
Power unit
Crankshaft main journal oil
clearance:
0.012–0.036 mm
(0.0005–0.0014 in)
Checking the crankshaft pin oil
clearance
1. Clean the bearings and the connecting
rod.
2. Install the upper half of the bearing into
the connecting rod 1 and the lower half
into the connecting rod cap 2.
CAUTION:
Install the bearings in their original posi-
tions.
NOTE:
Insert the projection a of the bearing into the
slot on the cap and connecting rod.
3. Put a piece of Plastigauge (PG-1) onto
the crank pin, parallel to the crankshaft.
62Y5A11