1987 Honda Fourtrax TRX 250X Service Manual, Page 226Get this manual
TROUBLESHOOTING 10Remove oillevelg8ug6 and check oil levelOil level too high Oil level too low Contaminated oil
CORRECT
11 Remove valve adjuster cover and inspect lubricationVALVE TRAIN LUBRICATED PROPERLY
VALVE TRAIN- -_ LUBRICATED PROPERLY
Clogged oil passaage Clogged oil control orifice Faulty oil pump
12Check if engine overheatsNOT OVERHEATED
13Accelerate or run at high speedENGINE DOES NOT KNOCK
OVERHEATEOE)(cessive carbon build-up in com bustion chamber Use of improper quality of fuel Clutch slipping Fuel-air mixture too lean
ENGINE KNOCKSWorn piston and cylinder Fuel-air mixture too lean Use of improper grade of fuel Excessive carbon build-up in combustion chamber Ignition timing too advanced (Faulty COl unit or pulse generator)