1986-1987 Honda Fortrax TRX70 Service Manual, Page 148Get this manual
TROUBLESHOOTING 10Remove oil filler capdip stick; check oil level
CORRECT
Oil lEVEL INCORRECT-'-_(1) Oil level too high (2) Oil level too low (3) Contaminated oil
11 Rimolle the valve inspection hole
cap and check lubrication
VALVE TRAIN(l) Clogged oil passage LUBRICATED PROPERLY (2) Clogged oil strainer (3) Faulty oil pump
VALVE TRAIN LUBRICATED
PROPERLY
12Check if engine overheats
NOT OVERHEATED
OVERHEATED- 11 Excessive carbon build-up in com( bustion chamber (2) Use of rmproper quality of fuel (3) Clutch slipping (4) Fuelair mixture too lean ENGINE ('I (2) 131 (4) Worn piston and cylinder Fuelair mil(ture too lean Use of improper grade of fuel Excessive carbon build-up in combustion chamber (5) Ignition timing too adlanced (Faulty COl unit or pulse generator)