Loss Power - Eton ATV RXL 50 Service Manual

13.4 LOSS POWER

RAISE WHEELS OFF GROUND
AND SPIN BY HAND
SPIN FREELY
CHECK TIRE PRESSURE
PRESSURE NORMAL
ACCELERATE LIGHTY
ENGINE SPEED INCREASE
CHECK IGNITION TIMING
O.K.
TEST CYLINDER COMPRESSION
O.K.
CHECK CARBURETOR
O.K.
CHECK SPARK PLUG
O.K.
CHECK FOR ENGINE
OVERHEATING
O.K.
ACCELERATE OR RUN
AT HIGH SPEED
DOES NOT SPIN FREELY
PESSURE LOW CHECK TIRE
ENGINE SPEED DOES
NOT INCREASE
N.G.
TOO LOW
CLOGGED
FOULED OR DISCOLOED
OVERHEATING
KNOCKS
POSSIBLE REASON
★ Brake dragging
★ Drive chain too tight
★ Damaged wheel bearing
★ Wheel bearing needs lubrication
★ Punctured tire
★ Faulty tire valve
★ Fuel / air mixture ratio too rich or lean
★ Clogged in air cleaner
★ Clogged in muffler
★ Restricted fuel flow
★ Clogged fuel tank cap breather hole
★ Faulty pulse generator
★ Faulty CDI unit
★ Leaking head gasket
★ Worn cylinder and piston rings
★ Clean
★ Clean the spark plug
★ Spark plug is incorrect heat range
★ Excessive carbon deposited in
Combustion chamber
★ Wrong type of fuel
★ Fuel / air mixture ratio is lean
★ Use of poor quality fuel
★ worn piston and cylinder
★ Fuel / air mixture ratio is lean
★ Wrong type of fuel
★ Ignition timing too advanced
★ Excessive carbon deposited in
Combustion chamber
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