Yamaha RS90GTZ Service Manual page 90

Part
Torque cam Cam angle
(spring seat)
Shim Quantity
Element
The cam angle determines the degree of sensitivity
of load torque detection.
• A smaller cam angle increases sensitivity, which in
turn increases the sheave thrust to make back
shifting easier. The shifting speed tends to
increase and shifting becomes somewhat harder.
(increasing the sheave thrust)
• A larger cam angle makes back shifting harder.
The shifting speed tends to decrease and shifting
becomes somewhat easier.
(decreasing the sheave thrust)
Size of the secondary sheave clearance (between
fixed sheave and sliding sheave) can be adjusted
by the number of shims used.
Adjust the clearance when the V-belt wear deterio-
rates and belt width becomes smaller.
• Using more shims makes secondary sheave
clearance smaller.
• Using less shim makes secondary sheave clear-
ance larger.
When the V-belt width is smaller, wrap-around
diameter of the V-belt on the primary sheave is
larger and clutch engagement speed is slightly
increased.
2-67
INSP
CLUTCH
ADJ
Impact on the shifting function