2006 Arctic Cat DVX 400 Service Manual, Page 156Get this manual
Engine Problem: Engine will not start or is hard to start (Compression too low) Condition Remedy 1Valve clearance out of adjustment 1Adjust clearance
2Valve guides wornseated poorly 3Valves mistimed 4Piston rings worn excessively 5Cylinder bore worn 6Spark plug seating poorly 2Repairreplace guides 3Time camshafts 4Replace rings 5Replacerebore cylinder 6Tighten plug
7Starter motor cranks too slowlydoes not turn 7See Electrical in this section Problem: Engine will not start or is hard to start (No spark) Condition Remedy 1Spark plug fouled 1Cleanreplace plug 2Spark plug wet 3Magneto defective 4CDI unit defective 5Ignition coil defective 2Cleandry plug 3Replace magneto 4Replace CDI unit 5Replace ignition coil
6High-tension lead openshorted 6Replace high tension lead Problem: Engine will not start or is hard to start (No fuel reaching the carburetor) Condition Remedy 1Gas tank vent hose obstructed 1Clean vent hose 2Carburetor inlet needle defective 3Fuel hose obstructed 4Fuel screens obstructed 5Fuel valve cloggeddefective 2Replace needle 3Cleanreplace hose 4Cleanreplace inlet screenvalve screen 5Cleanreplace valve