2006 Arctic Cat DVX 400 Service Manual, Page 17Get this manual

2006 Arctic Cat DVX 400 Service Manual, Page 17

Testing Engine Compression To test engine compression, use the following procedure1Remove the high tension lead from the
the spark plugDirt could enter engine when removing or installing the spark plug 5While holding the throttle lever in the
full-open position, crank the engine over with the electric starter until the gauge shows peak reading (five to 10 compression
strokes)The compression should be 10.0 kgcm2 (142 psi)6If compression is abnormally low, inspect the following itemsAVerify
starter cranks engine over at normal cranking speedBGauge is functioning properlyCThrottle lever in the full-open positionDValvetappet
clearance correctEValve bent or burned Adjust the gap to 0.70.8 mm (0.0280.032 inUse feeler gauge to check the gap ATV0052B
FValve seat burnedNOTE: To service valves, see Section 3 When installing the spark plug, tighten to specifications (see Section