2004-2006 Honda FourTrax Rancher TRX350TE/TM/FE/FM Service Manual, Page 129Get this manual
CYLINDER HEADVALVE
TROUBLESHOOTING
Engine top-end problems usually affect engine performanceThese can be diagnosed by compression test, or by tracin top-end noise wi sounding rod or stethoscope If the performance is poor at low speeds, check for white smoke in he crankcase breather tubeIf the tube is smoky, check for seized piston ring (page 9-61Compression too low, hard starting or poor perform ance at low speed ValvesInco rrect va lve adjustmentBurned or bent valvesInco rrect valve timingBroken va lve springUneven valve seatingValve stuck open Cyl inder headLeaking or da maged cylinder head gasketWarped or cracke cyli nder headLoose spark plug Cylinderpiston problem (page 9-3) Compression too high Excessive ca rb build-up on pisto head or combustio chamber Worn or damaged decompressor system Excessive smoke Worn valve stem or va lve guide Damaged stem sea Cyli nd erp iston problem (page 9-3) Excessive noise In co rr ect va lve clearance Sticking va lve or broke va lve spring Excessively worn va lve seat Wo rn or damaged camshaft Worn rocker arm andor shaft Worn rocker arm fo ll ower or va lve ste end Worn or damaged push ro andor cam fol lower Worn cam chain Worn or damaged cam chain tensione Worn cam sprocket teeth Cyl in der piston problem (page 9-3) Rough idle Low cylinder compression