Chapter 5. Power Train; Drive; Sheave Adjustment - Yamaha SRX440 1980 Service Manual

1980 SRX440
CHAPTER 5.
5-1. DRIVE
A. Sheave adjustment
Use the sheave gauge to check the following:
Center to center distance between the
primary and secondary sheaves.
Off-set between the inside edge of the
sheaves.
Alignment of sheaves.
POWER TRAIN
If any of these is incorrect. proceed as fol-
lows:
1. Sheave distance and alignment adjust-
ment
a. Loosen the intake silencer securing
bolts.
b. Loosen the engine mounting nuts.
c. Adjust sheave distance and alignment
by moving the engine back. forth or
sideways.
. .
Tool name Tool No.
Sheave gauge
90890-01875
.
Sheave distance:
270
~~
mm (10.63
+0
-0.11
in)
1. Sheave distance 2. Sheave off-set
+
0
+
O . 5.5
±
0.5
mm
(0217
±
0.020
in)
270 -3 mm (10.63 _O.11m)
Sheave distance check
1. Sheave gauge
Sheave offset/alignment check
NOTE:
------~----­
If sheave distance or alignment is not ad-
bolts on the bearing housing supporting the
secondary shaft and readjust sheave dist-
ance and sheave alignment.
Bearing housing-bolt tightening
torque:
65 Nm (6.5 m-kg)
d. Tighten the engine mounting nuts.
Tightening torque:
52 Nm (5.2 m-kg)
e. Tighten the intake silencer securing
bolts.
1. Sheave gauge
5-2