Vespa LX Series User Manual

Insufficient lubrication pressure
LOW LUBRICATION PRESSURE
Possible Cause Operation
By-Pass remains open Check the By-Pass and replace if required. Carefully clean the
By-Pass area.
Oil pump with excessive clearance Perform the dimensional checks on the oil pump components
Oil filter too dirty Replace the cartridge filter
Oil level too low Restore the level adding the recommended oil type
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
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 deviation
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
BRAKE OVERHEAT
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 deviation
of the disc.
Defective piston sliding Check calliper and replace any damaged part.
Electrical system
Troubleshooting Vespa LX 125 - 150 i.e.
TROUBL - 46

Vespa LX Series Specifications

General

Brand	Vespa
Model	LX Series
Category	Scooter
Language	English