2011 Arctic Cat 400 TRV ATV Service Manual, Page 23Get this manual
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
123456789101112Valve clearance out of adjustment Valve seating poor Valve guides defective Rocker armsarm shaft worn Magneto defective CDI unit defective Spark plug fouledgap too wide Ignition coil defective Float out of adjustment Jets obstructed Pilot screw setting improper Fuel injector obstructed
123456789101112Adjust clearance Replaceservice seatsvalves Replace guides Replace armsshafts Replace magneto Replace CDI unit Adjust gapreplace plug Replace ignition coil Adjust float height Clean jets Adjust pilot screw Replace fuel injector