2008 Arctic Cat ThunderCat ATV Service Manual, Page 28Get this manual
Problem: Engine noisy (Noise seems to come from crankshaft) Condition Remedy 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 Remedy
12345Gears wornrubbing Splines worn Primary gears wornrubbing Bearings worn Bushing worn 12345Replace gears Replace shaft(s) Replace gears Replace bearings Replace bushing
Problem: Engine noisy (Noise seems to come from secondary bevel gear and final driven shaft) Condition Remedy
1234567Drivedriven bevel gears damagedworn Backlash excessive Tooth contact improper Bearing damaged Gears wornrubbing Splines worn Final driven shaft thrust clearance too large 1234567Replace gears Adjust backlash Adjust contact Replace bearing Replace gears Replace shaft(s) Replace thrust washer(s)
Problem: Engine idles poorly Condition
12345678Valve clearance out of adjustment Valve seating poor Valve guides defective Rocker armsarm shaft worn ECU defective Spark plug fouledgap too wide Ignition coil defective Fuel injector obstructed