Poor Speed Performance; Ignition System - Linhai LH500ATV-D Owner's/Operator's Manual

17. TROUBLESHOOTING
Improperly adjusted fuel level
Clogged main nozzle
Clogged or loose pilot jet

POOR SPEED PERFORMANCE

Ignition system

Dirty spark plug
Improper heat range
Faulty igniter unit
Faulty pick up coil
Fuel system
Clogged fuel tank breather hole
Clogged air cleaner element
Clogged jet
Improperly adjusted fuel level
Improper carburetor air vent hose Faulty valve timing
setting
OVER HEATING OR OVER-COOLING
OVER HEATING
Clogged air cleaner element
Compression system
Worn cylinder
Worn or seized piston ring
Cylinder head gasket broken
Cylinder gasket broken
Carbon deposit buildup
Improper adjusted valve
clearance
Improper contacted
valve and valve seat
Clutch
Refer to "CLUTCH SLIPPING
/DRAGGING" section
Engine oil
Improper oil level(low or
over Oil level)
Ignition system
Faulty spark plug
Faulty high tension cord
Faulty ignitor unit
Faulty pick up coil
Faulty ignition coil
Valve system
Improperly adjusted valve
clearance
OVER-COOLING
17-5