2009-2012 Honda MUV700 Big Red Service Manual, Page 230Get this manual
CYLINDER HEADVALVECAMSHAFT
TROUBLESHOOTING
Engine top-end problems usually affect engine performanceThese can be diagnosed by compression test, or by tracing top-end noise ith sounding rod or stethoscope If the performance is poor at low speeds, check for wh ite smoke in the crankcase breather hoseIf the hose is smoky, check for seized piston ring (page 10-2)Compression too low, hard starting or poor performance at low speed Valves:Incorrect valve adjustmentBurned or bent valveIncorrect valve tim ngBroken valve springUneven valve seatingValve stuck open Cylinder head:Leaking or damaged cylinder head gasketLoose spark plugWarped or cracked cylinder head Cylinderpiston problem (page Compression too high, overheating or knocking Excessive carbon bu ld-up on piston head or combustion chamber Worn or damaged decompressor system Excessive smoke Worn valve stem or valve guide Damaged stem seal Cyl inderpiston problem (page Excessive noise Incorrect valve clearance Sticking valve or broken valve spring Excessively worn valve seat Worn or damaged camshaft Worn rocker arm andor shaft Worn rocker arm follower or valve stem end Worn or damaged push rod andor cam follower Worn cam chain Worn or damaged cam cha in tensioner Worn cam sprocket teeth Cylinderpiston problem (page 10-3) Rough idle Low cylinder compression