Drive Chain - Yamaha YTZ250S 1986 Service Manual

Swingarm-Connecting rod
48 Nm (4.8 m . kg, 35 ft 'Ib)
Rear wheel hub - Swingarm
Upper: 50 Nm (5.0 m' kg, 36 ft· Ib)
Lower: 80 Nm (8.0 m . kg, 58 ft 'Ib)
Brake caliper
35 Nm (3.5 m . kg, 25 ft· Ib)
Rear axle nut
100 Nm (10.0 m' kg, 72 ft 'Ib)
Rear axle ring nut
Apply locking agent (LOCTITE®) to
ring nuts threads
1 st: Tighten the inside ring nut
55 Nm (5.5 m' kg, 40 ft 'Ib)
2nd: Tighten the outside ring nut while
holding the inside ring nut
190 Nm (19 m' kg, 140 ft 'Ib)
3rd: Loosen the inside ring nut while
holding the outside ring nut
240 Nm (24 m' kg, 170 ft 'Ib)
WARNING:
Always use the new cotter pin on the ax-
le nut.
4-29
DRIVE CHAIN
1. Remove the change pedal and drive
sprocket cover.
2. Remove the master link clip and discon-
nect the drive chain.
3. Inspect the teeth on the rear sprocket; if
they are worn as shown in the illustra-
tions below, replace the sprockets and
chain as a set.
1. Slip off 2. Bend teeth
1. 1/4 tooth 3. Roller
2. Correct 4. Sprocket
4. If the chain stays bent or kinked after
cleaning and lubrication, or if the chain
can be pulled away from the sprocket
more than
112
the length of a sprocket
tooth, the chain and sprockets should be
replaced as a set.