2008 Arctic Cat 400/500/650/700 ATV Service Manual, Page 43Get this manual
Problem: Engine noisy (Noise seems to come from timing chain) Condition 1Chain stretched 2Sprockets worn 3Tension adjuster malfunctioning
1Replace chain 2Replace sprockets 3Repairreplace adjuster
Problem: Engine noisy (Noise seems to come from clutch) Condition
12345Crankshaft splinesbearings worn Countershafthub splines worn Clutch plate teeth worn Drivendrive clutch plates distortedbroken Clutch dampers weak
12345Replace crankshaftbearings Replace countershafthub Replace clutch plate(s) Replace clutch plate(s) Replace dampers
Problem: Engine noisy (Noise seems to come from crankshaft) Condition
1Bearing wornburned 2Lower rod-end bearing wornburned 3Connecting rod side clearance too large
1Replace bearing 2Replace bearing 3Replace thrust washer(s)
Problem: Engine noisy (Noise seems to come from transmission) Condition
12345Gears wornrubbing Splines worn Primary gears wornrubbing Bearings worn Bushing worn