87
POOR IDLE SPEED PERFORMANCE
Carburetor Air cleaner
·
Loose or clogged pilot jet
·
Clogged air cleaner element
·
Damaged carburetor joint
Ignition system
·
Improperly tightened carburetor
·
Fault spark plug
·
Joint clamp hose
·
Fault high tension cord
·
Improperly adjusted idle speed
·
Fault igniter unit
(Pilot screw), (Throttle stop screw)
·
Fault pick up coil
·
Improperly adjusted throttle cable
·
Fault ignition coil
·
Flooded carburetor
Valve system
·
Improperly adjusted
·
Valve clearance
POOR MEDIUM AND HIGH SPEED PERFORMANCE
Carburetor Air cleaner
·
Improperly adjusted fuel level
·
Clogged air cleaner element
·
Clogged main nozzle
·
Clogged or loose pilot jet
POOR SPEED PERFORMANCE
Ignition system Compression system
·
Dirty spark plug
·
Worn cylinder
·
Improper heat range
·
Worn or seized piston ring
·
Faulty igniter unit
·
Cylinder head gasket broken
·
Faulty pick up coil
·
Cylinder gasket broken
Fuel system
·
Carbon deposit build up
·
Clogged fuel tank breather hole
·
Improperly adjusted valve
·
Clogged air cleaner element clearance
·
Clogged jet
·
Improperly contacted
·
Improperly adjusted fuel level valve and valve seat
·
Improper carburetor air vent hose
·
Faulty valve timing
setting
