PIAGGIO MSS Fly 50 4T User Manual

Possible Cause Operation
Incorrect idle adjustment Adjust using the rpm indicator
Pressure too low at the end of compression Check the thermal group seals and replace worn components
Faulty spark plug or incorrect ignition advance Replace the spark plug or check the ignition circuit components
The starter remains on Check: electric wiring, circuit not interrupted, mechanical
movement and power supply; replace if necessary
Minimum nozzle dirty Wash the nozzle with solvent and dry with compressed air
Excessive exhaust noise
EXCESSIVE EXHAUST NOISE
Possible Cause Operation
Depression intake pipe of the secondary air device disconnec-
ted or dented
Replace the pipe
Reed valve of the secondary air device does not close correctly
and wears out the rubber coupling between the device and the
head pipe
Replace the device and the coupling
High fuel consumption
HIGH FUEL CONSUMPTION
Possible Cause Operation
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.
Loose nozzles Check the maximum and minimum nozzles are adequately
fixed in their fittings
Starter inefficient Check: electric wiring, circuit continuity, mechanical sliding and
power supply
Air filter blocked or dirty. Dismantle the sponge, wash with water and shampoo, then
soak it in a mixture of 50% petrol and 50% of specific oil (Se-
lenia Air Filter Oil), then hand dry without squeezing, allow to
drip dry and then reassemble.
SAS malfunctions
ANOMALIES IN THE SECONDARY AIR DEVICE
Possible Cause
Operation
Depression intake pipe of the secondary air device disconnec-
ted or dented
Replace the pipe
Reed valve of the secondary air device does not close correctly
and wears out the rubber coupling between the device and the
head pipe
Replace the device and the coupling
Transmission and brakes
Clutch grabbing or performing inadequately
IRREGULAR CLUTCH PERFORMANCE OR SLIPPAGE
Possible Cause
Operation
Faulty clutch Check that there is no grease on the masses. Check that the
clutch mass contact surface with the casing is mainly in the
centre with equivalent characteristics on the three masses.
Check that the clutch casing is not scored or worn in an anom-
alous way
MSS Fly 50 4T Troubleshooting
TROUBL - 43

PIAGGIO MSS Fly 50 4T Specifications

General

Brand	PIAGGIO
Model	MSS Fly 50 4T
Category	Scooter
Language	English