2008 Arctic Cat DVX/Utility 50 ATV Service Manual, Page 59Get this manual
Problem: Engine idles poorly Condition 1Magneto defective 2CDI unit defective 3Spark plug fouledgap too wide 4Ignition coil defective 5Float level out of adjustment 6Carburetor jets obstructed 7Pilot screw setting improper
Remedy 1Replace magneto
2Replace CDI unit 3Adjust gapreplace plug 4Replace ignition coil 5Adjust float height 6Clean jets 7Adjust pilot screw
Problem: Engine runs poorly at high speed Condition 1Spark plug gap too narrow
2Ignition coil defective 3Float level too low 4Air cleaner element obstructed 5Fuel hose obstructed 6Carburetor jets obstructed 7Air filter inlet pipe obstructed Problem: Exhaust smoke dirty or heavy Condition 1Piston ringscylinder worn 2Cylinder wall scoredscuffed 3Crankcase over-full of oil 4Air filter too much air filter element oil 5Carburetor jets incorrect size (too big) Problem: Engine lacks power Condition 1Piston ring(s)cylinder worn 2Spark plug fouled 3Spark plug gap incorrect 4Carburetor jets obstructed 5Float level out of adjustment 6Air filter element obstructed 7Intake manifold leaking air 8Brake(s) dragging 9Drive axle bentworn bearings 10Drive chainsprockets stretchedworn