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6. THERE EXISTS ABNORMAL NOISE WHEN ENGINE RUNNING
TROUBLE
CAUSE
REMEDY
Beating sound
Piston, piston ring or cylinder is worn
Replace the worn part
Connection rod or piston pin and piston pin
hole are worn
Replace the worn part
Crankshaft main neck is worn
Replace bearing
Piston ring is broken
Replace piston ring
Metal beating sound when abnormal combustion occurs
Too much carbon deposit in combusting
chamber
Clear away carbon deposit
Too small electrode clearance of spark plug Adjust electrode clearance prop-
erly
Engine fuel is too much
Check relative parts such as car-
buretor
Improper fuel brand
Replace fuel
Engine is overheat
Find a cause and eliminate it
The other
Improper valve clearance
Readjust valve clearance prop-
erly
Fly wheel is not connected with crankshaft
tightly
Connect tightly
TROUBLESHOOTING
Summary of Contents for R300
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