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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 temperature, altitude or surface condition may vary this critical engi-
ne RPM thus affecting snowmobile efficiency.
Calibration screws should be adjusted so that actual maximum engine RPM in
vehicle matches 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
adjustment 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).
TRA drive pulley
1. Position 1 (not numbered)
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