2-61CLUTCH/GEAR SELECTION INSPADJThe clutch may require tuning depending uponwhere the machine will be operated and the de-sired handling characteristics. The clutch canbe tuned by changing the engagement andshifting speeds.Clutch engagement speed is defined as the en-gine speed at which the machine first begins tomove from a complete stop.Clutch shifting speed is defined as the enginespeed reached when the machine has travelled800 m (2,500 ft) after being started at full-throttle from a dead stop.Normally, when a machine reaches shiftingspeed, the vehicle speed increases but the en-gine speed remains nearly constant. Under un-favorable conditions (wet snow, icy snow, hills,or rough terrain), however, engine speed maydecrease after the shifting speed has beenreached.A Engine speedB Good conditionC Clutch shifting speedD Clutch engagement speedE Starting positionF Distance travelled 800 m (2,500 ft)GEAR SELECTIONThe reduction ratio of the driven gear to thedrive gear must be set according to the snowconditions. If there are many rough surfaces orunfavorable snow conditions, the drive/drivengear ratio should be increased. If the surfacesare fairly smooth or better snow conditions ex-ist, decrease the ratio.Gear ratio chartThe drive and driven gears and the chainsshown in the gear ratio chart are available asoptions. The figures containing a decimal pointrepresent the drive/driven gear ratios, while thebottom numbers designate the number of linksin the chain.
