Poor Performance; Rear Wheel Spins At Idle - PIAGGIO Vespa LX 150 4T Euro 3 Service Station Manual

Troubleshooting
Engine

Poor performance

Possible Cause
Air filter blocked or dirty.
Fuel nozzles or cock clogged or dirty
Dirty or faulty vacuum-operated cock
Failing automatic starter on the carburettor
Excessive driving belt wear
Lack of compression parts, cylinder and valves
Oil level exceeds maximum
Excess of encrustations in the combustion cham-
Incorrect timing or worn timing system elements
Muffler obstructed
Inefficient automatic transmission
Wrong valve adjustment
Overheated valves
Valve seat distorted
Worn cylinder, Worn or broken piston rings

Rear wheel spins at idle

REAR WHEEL ROTATES WITH ENGINE AT IDLE
Possible Cause
Idling rpm too high
Clutch fault
Starting difficulties
Possible Cause
Battery flat
TROUBL - 2
POOR PERFORMANCE
wear
ber
DIFFICULTY STARTING UP
Vespa LX 125 - 150 4T Euro 3
Operation
Remove the sponge, wash with water and car
shampoo, then soak it in a mixture of 50% petrol
and 50% specific oil. Press with your hand without
squeezing, allow it to drip dry and refit.
Dismantle, wash with solvent and dry with com-
pressed air
Check the filter on the cock, remove the petrol and
wash the tank, if necessary. Replace the cock as
a last resource.
Check the electrical wiring and mechanical move-
ment, replace if necessary.
Check it and replace, if necessary
Replace the worn parts
Check for causes and fill to reach the correct level
Descale the cylinder, the piston, the head and the
valves
Time the system again or replace the worn parts
Replace
Check the rollers and the pulley movement, re-
place the damaged parts and lubricate the mova-
ble guide of the driven pulley with grease.
Adjust the valve clearance properly
Remove the head and the valves, grind or replace
the valves
Replace the head assembly
Replace the piston cylinder assembly or just the
piston rings
Operation
Adjust the engine idle speed.
Check the springs / clutch masses
Operation
Check the state of the battery. If it shows signs of
sulphation replace it and bring the new battery into