PIAGGIO Vespa 125 Super Operation And Maintenance page 13

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OPERATING AND MAINTENANCE: COMMON OPERATIONS TO CARRY OUT
ADJUSTMENTS ON CARBURATOR
For adjusting the idling turn the slow running adjuster screw (fig. 9 n. 5).
- On the carburettor body a set screw is provided for adjusting the throttle cable play; this
screw is to be reset only if necessary or on dismantling and reassembly operations.
- On the air cleaner case, opposite to said screw, is a plugged hole. When this plug is
removed the spring loaded idler adjusting screw is accessible (Fig. 9, n. 14).
To avoid carburation troubles we recommend that this adjustment is carried out by a
Vespa dealer.
STARTING UP when the engine is flooded
In the case of difficulties caused by flooding (presence of unvaporised mixture in the
cylinder), the following methods can be used:
- Attempt push starting : engage the 2nd gear, declutch, push the vehicle to a certain
speed, sharply release the clutch and when the engine starts declutch.
- Close the fuel tap, remove the sparking plug (fig. 10) and clean; then kick over the
engine several times.
Screw in the sparking plug securely, open the fuel tap and start the engine.
Fig. 10. Dismantling spark plug