2005-2011 Honda Recon TRX250TE/TM service manual, Page 121Get this manual
CYLINDER HEADIVALVE
TROUBLESHOOTING
Engine top-end problems usually affect engine performanceThese can be diagnosed by compression lest, or by tracing top-end noise with sounding rod or stethoscope If the performance is poor at low speeds, check fo white smoke in the crankcase breather hoseIf the hose is smoky, check for seized piston ring (Section 8),