Lambretta V125 Special 2018 User Manual page 40

Troubleshooting
Troubleshooting chart
Failure
Engine turns but does not start or stalls
Engine power is poor
Engine overheats
To high oil consumption
Engine warning light is on
36
Cause
Wire harness is worn
Contact problem in a plug
No gasoline in the tank
Problem with the fuel pump
Fuel leakage
Air filter contaminated
Failure in fuel system
Problem with the ignition system
Valve clearance too little
Long operating time at higher engine
speed but low or no driving speed
Engine oil level too high
Cylinder/Piston is worn
Engine ventilation does not work correctly Check the engine ventilation system
Failure in the fuel injection/electric system Contact your dealer to identify the failure
To Do
Check the wiring harness
Check the plugs of the wiring harness
Refill gasoline
Check the fuel pump
Check the fuel circuit
Clean the air filter
Check the fuel system
Check the ignition system, contact your dealer
Contact your dealer to adjust the valve clearance
Let the engine cool down, avoid such driving behavior,
especially in city traffic
Bleed the oil system to the right specified of oil
Contact your dealer to replace the cylinder/ piston