1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 232Get this manual
TROUBLESHOOTING 10Remove 011 level gauge and check oil level
CORRECT
OIL lEVEl INCORRECT-_ II Oil level too high
(21 Oil level too low (3) Contaminated oil
11 Remove cylinder head cover and inspect lubrication VALVE TRA IN LUBRICATED PROPERLY
VALVE TRAIN NOT-_ (11 Clogged oil passage LUBRICATED PROPERLY (2) Clogged oil strainer
12chick if engine overheats
NOT OVERHEATED
13Accelerate or run at high speed