2001 Arctic Cat ATVs factory service and repair manual, Page 418Get this manual
Problem: Engine idles poorly Condition 1Valve clearance out of adjustment 2Valve seating poor 3Valve guides defective 4Rocker arms arm shaft worn 5Magneto defective 6CDI unit defective 7Spark plug fouled gap too wide 8Ignition coil defective 9Float out of adjustment 10Jets obstructed 11Pilot screw setting improper Problem: Engine runs poorly at high speed Condition 1High RPM "cut out" against RPM limiter 2Valve springs weak 3Valve timing out of adjustment 4Cams rocker arms worn 5Spark plug gap too narrow 6Ignition coil defective 7Float level too low 8Air cleaner element obstructed 9Fuel hose obstructed Problem: Exhaust smoke dirty or heavy Condition 1Oil (in the engine) overfilled contaminated 2Piston rings cylinder worn 3Valve guides worn 4Cylinder wall scored scuffed 5Valve stems worn 6Stem seals defective Remedy 1Drain excess oil replace oil 2Replace service rings cylinder 3Replace guides 4Replace service cylinder 5Replace valves 6Replace seals Remedy 1Shift into higher gear decrease speed 2Replace springs 3Adjust timing 4Replace cams arms 5Adjust gap 6Replace ignition oil 7Adjust float height 8Clean element 9Clean prime hose Remedy 1Adjust clearance 2Replace service seats valves 3Replace guides 4Replace arms shafts 5Replace magneto 6Replace CDI unit 7Adjust gap replace plug 8Replace ignition coil 9Adjust float height 10Clean jets 11Adjust pilot screw