2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 130Get this manual
CYLINDER HEADVALVE
CYLINDER COMPRESSION
Warm up the engine to normal operating temperature Stop the engine, disconnect the spark plug cap and remove th spark plugInstall the compression gauge into the spark plug holeShift the transm ission in neutral and close the choke knob (OFF!Open the thronle all the way and crank the engine with the starter motor until the gauge reading stops risingThe maximum reading is usually reached wi thinsecondsCOMPRESSION PRESSURE: 66 kPa (6.8 kgfcm97 psi) at 450 rpm
Check that th ere is no co nn ect io n-