Piaggio Fly 4T servicemanual - Scootergrisen
Piaggio Fly 4T servicemanual - Scootergrisen
Piaggio Fly 4T servicemanual - Scootergrisen
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Engine MSS <strong>Fly</strong> 50 <strong>4T</strong><br />
- Insert rubber pipes for chamber ventilation.<br />
- Insert the O-Ring, the washer, the spring and the<br />
idle flow screw in their seatings.<br />
- Refit the carburettor on the engine and connect<br />
again the accelerator cable with the sheath and the<br />
support plate and the electrical connection of the<br />
starter.<br />
- Reconnect the fuel supply pipe and tighten the 2<br />
clamping screw fixing the carburettor to the inlet<br />
manifold and the air inlet coupling to the filter.<br />
Adjusting the idle<br />
- The engine does not require frequent idle speed adjustments, but it is essential to strictly follow certain<br />
rules when adjusting the idle speed.<br />
- Before adjusting the carburettor make sure to respect requirements on lubrication, valve clearance,<br />
and complying timing; spark plug should be in optimum conditions, air filter clean and sealed, and the<br />
exhaust system tight.<br />
- Warm up the engine by running it at least 10 mi-<br />
nutes at a speed as close as possible to the max-<br />
imum one.<br />
- Connect the vehicle to the exhaust fumes analy-<br />
ser inserting the probe into a sealed extension pipe<br />
placed at the muffler exit end.<br />
N.B.<br />
THE EXTENSION TUBE IS INDISPENSABLE SO AS NOT<br />
TO SEND POLLUTED EXHAUST FUMES TO THE AMBIENT<br />
OXYGEN. IT IS ESSENTIAL TO USE AN EXHAUST FUMES<br />
ANALYSER PREVIOUSLY HEATED AND PREPARED TO<br />
GUARANTEE THE RESET OF THE READING OF GASES<br />
AND THE CORRECT GAS CAPACITY. FAILURE TO RE-<br />
SPECT THESE REGULATIONS RESULTS IN INACCURATE<br />
READINGS.<br />
Characteristic<br />
Pipe ideal length<br />
ENG - 122
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