Poor Performance; Rear Wheel Spins At Idle; Starting Difficulties - PIAGGIO XEVO 125 Euro 3 Service Station Manual

Troubleshooting
This section makes it possible to find what solutions to apply when troubleshooting.
For each breakdown, a list of the possible causes and respective interventions is given.
Engine

Poor performance

Possible Cause
The carburettor is dirty; fuel pump or vacuum valve
damaged
Excess of encrustations in the combustion cham-
Incorrect timing or worn timing system elements
Muffler obstructed
Air filter blocked or dirty.
Automatic starter failure
Oil level exceeds maximum
Lack of compression: parts, cylinder and valves
Transmission belt worn
Inefficient automatic transmission
Clutch slipping
Overheated valves
Wrong valve adjustment
Valve seat distorted
Defective floating valve

Rear wheel spins at idle

Starting difficulties

Possible Cause
Altered fuel characteristics
Rpm too low at start-up or engine and start-up
system damaged
TROUBL - 2
POOR PERFORMANCE
ber
worn
DIFFICULT STARTING
Operation
Remove, wash with solvent and dry with com-
pressed air or replace
Descale the cylinder, the piston, the head and the
valves
Time the system again or replace the worn parts
Replace
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.
Check: mechanical movement, electric connec-
tion and fuel supply, replace if required.
Check for causes and fill to reach the correct level
Replace the worn parts
Replace
Check the rollers, the pulley movement and make
sure the drive belt is in good conditions; replace
the damaged parts and lubricate the moveable
driven pulley with specific grease.
Check the clutch system and/or the bell and re-
place if necessary
Remove the head and the valves, grind or replace
the valves
Adjust the valve clearance properly
Replace the head assembly
Check the proper sliding of the float and the func-
tioning of the valve
Operation
Drain off the fuel no longer up to standard; then,
refill
Check the starter motor, the system and the torque
limiter
XEVO 125 Euro 3