PIAGGIO Liberty 125, Workshop Manual, Page: 37 / 212

High fuel consumption
EXCESSIVE FUEL CONSUMPTION
Possible Cause Operation
Air filter blocked or dirty. Clean according to the procedure
Starter inefficient Check: electric wiring, circuit continuity, mechanical sliding and
power supply
Loose nozzles Check the maximum and minimum nozzles are adequately
fixed in their fittings
Incorrect float level Restore the level in the tank by bending on the float the thrust-
ing reed of the petrol inlet rod so as to have the float parallel to
the tank level with the carburettor inverted.
Transmission and brakes
Clutch grabbing or performing inadequately
IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause Operation
Slippage or irregular functioning Check that there is no grease on the masses.
Check that the faying surface between the clutch masses and
the clutch bell is mainly in the middle and with equivalent spec-
ifications on the three masses.
Check that the clutch bell is not scored or worn abnormally
Never run the engine without the clutch bell
Insufficient braking
INEFFICIENT OR NOISY BRAKING
Possible Cause Operation
Worn brake pads or shoes Replace the brake pads or shoes and check for brake disk or
drum wear conditions.
Front brake disk loose or deformed Check the brake disc screws are locked; use a dial gauge and
a wheel mounted on the vehicle to measure the axial shift of
the disc.
Air bubbles inside the hydraulic braking system Carefully bleed the hydraulic braking system, (there must be
no flexible movement of the brake lever).
Fluid leakage in hydraulic braking system Failing elastic fittings, plunger or brake pump seals, replace
Excessive backlash in the rear brake control cable Adjust the backlash with the appropriate adjuster located on
the back part of the crankcase.
Brakes overheating
BRAKES OVERHEATING
Possible Cause Operation
Rubber gaskets swollen or stuck Replace gaskets.
Compensation holes on the pump clogged Clean carefully and blast with compressed air
Brake disc slack or distorted Check the brake disc screws are locked; use a dial gauge and
a wheel mounted on the vehicle to measure the axial shift of
the disc.
Defective piston sliding Check calliper and replace any damaged part.
Liberty 125 - 200 4tempi
Troubleshooting
TROUBL - 37