2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 215Get this manual

2012 Sportsman 400/500 and EFI Tractor Service Manual 9923412, Page 215

CLUTCHING Drive Clutch Operation Drive clutches primarily sense engine RPMThe two major components which control its shifting
transmission input shaft is greater than the load from the drive belt, the drive belt is kept at the outer diameter of the
driven clutch sheavesAs engine RPM and horsepower increase, the load from the drive belt increases, resulting in the belt
rotating up toward the outer diameter of the drive clutch sheaves and downward into the sheaves of the driven clutchThis
action, which increases the driven clutch speed, is called upshiftingShould the throttle setting remain the same and the
vehicle is subjected to heavier load, the drive belt rotates back up toward the outer diameter of the driven clutch and downward
into the sheaves of the drive clutchThis action, which decreases the driven clutch speed, is called backshiftingIn situations
where loads vary (such as uphill and downhill) and throttle settings are constant, the drive and driven clutches are continually