1990-1998 Arctic Cat Snowmobiles Repair Manual, Page 72Get this manual
62 Drive Belt Not Operating Smoothly in Primary Sheave
aRough, grooved, pitted or scored drive sheave facebDefective drive belt
CHAPTER TWO Glazed Drive Belt
aExcessive slippage caused by stuck or frozen trackbEngine idle speed too high
Uneven Drive Belt Wear
aMisaligned primary and secondary sheavesbLoose engine mounts
Drive Belt Too Tight at Idle
aEngine idle speed too highbIncorrect sheave distancecIncorrect belt lengthI Pinging
ABNORMAL ENGINE NOISE
1 Check: Ignition timing too advanced Incorrect spark plug heat range Excessive carbon buildup in combustion chamber Incorrect fueloil mixture ratio Poor quality fuel