58
ENGLISH
TRA Drive pulley adjustment
The drive pulley is factory calibrated to transmit maximum engine power at a predefined
RPM. refer to TECHNICAL DATA at the end of this guide. Factors such as ambient temperatu-
re, altitude or surface condition may vary this critical engine RPM thus affecting snowmobile
efficiency.
Calibration screws should be adjusted so that actual maximum engine RPM in vehicle mat-
ches with the maximum horsepower RPM.
Use precision digital tachometer for engine RPM adjustment.
The adjustment has an effect on high RPM only.
To adjust, turn calibration screws.
CAUTION!
Exceeding the engine RPM results to engine damage. Follow the adjust-
ment sets according technical data.
Calibration screw has a notch on top of its head. There are 6 positions numbered 1 to 6.
1. Notch
1. Notch
There are 6 positions numbered 1 to 6. Note that in position 1 the number is substitued by a
dot (due to its location on casting).
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