Lubrication Troubleshooting - Honda Motorcycle Service Manual

LUBRICATION
TROUBLESHOOTING
4-Stroke Engines:
2-Stroke Engines With Separate Oiling System:
Oil level low
Excessive smoke and/or carbon on spark plug
Oil consumption
Faulty oil pump (too much oil flow)
.
External oil leaks
.
Low quality engine oil
.
Worn piston ring or incorrect piston ring installation
Worn valve guide or seal
.
Oil pump worn or damaged (Dry sump engine)
Oil contamination [White appearance)
.
From coolant mixing with oil (liquid-cooled engine)
- Faulty water pump mechanical seal
- Faulty head gasket
- Water leak in crankcase
Low or no oil pressure
Clogged oil orifice andlor orifices
.
Incorrect oil being used
Only On Models Equipped With Oil Pressure Switch:
High oil pressure
Pressure relief valve stuck closed
-
Plugged oil filter, gallery, or metering orifice
lncorrect oil being used
Low oil pressure
Pressure relief valve stuck open
Clogged oil filter screen
.
Oil pump worn or damaged
Internal oil leaks
.
lncorrect oil being used
.
Low oil level
No oil pressure
.
Oil level too low .
Oil pump drive chain or drive sprocket broken
Oil pump damaged (pump shaft)
Internal oil leaks
Overheating or seized piston
.
No oil in tank or clogged oil line
.
Air in oil lines
Faulty oil pump ltoo little oil flow)
.
Clogged oil strainer
-
Oil not flowing out of tank
.
Clogged oil tank cap breather hole -
Clogged oil strainer
2-Stroke Engines Using Premixed Fuel/Oil:
Excessive smoke and/or carbon on spark plug .
Improper jetting for altitude, air temperature and track
conditions
lmproperly mixed fuelloil-too much oil in fuel
.
Fuelloil mixture too old-gasoline has evaporatedigone
bad
Overheating or seized piston
.
Improper jetting for altitude, air temperature and track
conditions
.
Fuelloil mixture too old-oxidized oilldegradei
lubrication
.
Premix oil too old-oxidizedidegraded lubrication
-
Poor quality premix oil
.
lmproperly mixed fuelioil-too little oil in fuel
-
Using fuel/oil premix ratio other than recommended
Date of Issue
:
March,
1995
4-2
o
HONDA MOTOR CO.,LTD.