2006-2009 Honda TRX680 (TRX 680 FA-FGA) Factory Service Manual, Page 107Get this manual
LUBRICATION SYSTEM
TROUBLESHOOTING
Oil level too lowhigh oil consumption Oil consumption
External oil leak Worn piston rings or incorrect piston ring installation Worn cylinder Worn valve guides or stem seals Oil pump worn or damaged
Low oil pressure
Oil level low Oil pressure relief valve wear
Clogged oil straineror filter
Faulty oil pump
Internal oil leak
Incorrect oil being used
No oil pressure
Oil level too low