Crankcase; Change Shaft Assembly; Primary Drive Gear And Clutch Assembly; Crankcase Cover (Right) - Yamaha YT175J 1982 Service Manual

Crankcase
1. Apply YAMAHA BOND #4 to the
mating surfaces of both case halves.
NOTE: _ _ _ _ _ _ _ _ _ _ _ _
a. Do not tap on machined surface or end
of crankshaft.
b. Before installing the crankshaft, check
the crankshaft a-ring for damage.
2. After reassembly, apply a liberal coating
of two-stroke oil to the crank pin and
bearing and into each crankshaft bear-
ing oil delivery hole.
3. Check crankshaft and transmission
shafts for proper operation and freedom
of movement.
Change shaft assembly
1. Take special care so that all parts are in-
stalled correctly. Refer to the illustra-
tion.
2. Engage the gear in first and adjust with
adjusting screw so that the mating
marks meet on segment and shift lever.
1. Adjusting screw
2. Lock nut
Primary drive gear and clutch assembly
3-19
1. Install the primary drive gear onto the
crankshaft.
Primary drive gear nut torque:
55 Nm (5.5 m· kg, 40 ft ·Ib)
2. Install the clutch assembly onto the
main axle.
Clutch boss tightening torque:
40 Nm (4.0 m· kg, 29 ft ·Ib)
When install the circlip be sure to locate
it as illustration below.
1. Circiip 2. Clutch housing
Crankcase cover (right)
Install crankcase cover.
Piston
1. During reassembly, coat the piston ring
grooves, piston skirt areas, piston pin
and bearing with two-stroke oil.
2. Install new piston pin clips and make
sure they are fully seated in their
grooves.
NOTE: _______________ __
Take care during installation to avoid damag-
ing the piston skirts against the crankcase as
the cylinder is installed. Note the two induc-
tion holes in the piston skirt. These must be
to the rear during installation.