2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 511Get this manual

2006 Arctic Cat ATVs 400/400TBX/400TRV/500/500TBX/500TRV/650H1/650 V-Twin Service Manual, Page 511

Engine NOTE: ConditionRemedy marked with an asterisk () is for manual transmission models onlyProblem: Engine will not start
Engine will not start or is hard to start (No fuel reaching the carburetor) Condition Remedy Gas tank vent hose obstructed
Carburetor inlet needle defective Fuel hose obstructed Fuel screens obstructed Clean vent hose Replace needle Cleanreplace
hose Cleanreplace inlet screenvalve screen Problem: Engine stalls easily Condition Spark plug fouled Magneto defective CDI
unit defective Carburetor jets obstructed Valve clearance out of adjustment Clean plug Replace magneto Replace CDI unit Clean
jets Adjust clearance Problem: Engine noisy (Excessive valve chatter) Condition Valve clearance too large Valve spring(s)
weakbroken Rocker armrocker arm shaft worn Camshaft worn Adjust clearance Replace spring(s) Replace armshaft Replace camshaft
Problem: Engine noisy (Noise seems to come from piston) Condition Remedy Pistoncylinder worn Combustion chamber carbon buildup