VESPA 664787 Service Station Manual page 30

Maintenance
Hub oil - change
Spark plug - replacement
Air filter - clean
Idling speed (*) - adjustment
Cylinder cooling system - check/cleaning
Oil mixer/throttle linkage - adjustment
Driving belt - replacement
Variable speed rollers - replacement
Mixer belt - replacement
Odometer gear - greasing
Steering - Check
Brake control levers - greasing
Brake pads - check condition and wear
Brake fluid - check
Transmission elements - lubrication
Safety locks - check
Suspensions - check
Electrical system and battery - check
Headlight - adjustment
Tyre pressure and wear - check
Secondary air filter - cleaning
Vehicle and brake test - road test
(*) See the «Idle speed adjustment» section
Carburettor
- Disassemble the carburettor in its parts, wash all
of them with solvent, dry all body grooves with
compressed air to ensure adequate cleaning.
- Check carefully that the parts are in good condi-
tion.
-The throttle valve should move freely in the
chamber. Replace valve in case of wear due to
excessive clearance.
- If there are wear marks in the chamber causing
inadequate tightness or a free valve slide (even if
it is new), replace the carburettor.
- It is advisable to replace the gaskets at every refit.
WARNING
PETROL IS HIGHLY EXPLOSIVE ALWAYS REPLACE THE
GASKETS TO AVOID PETROL LEAKS
1. Automatic starter - 2. Idle air set screw - 3. Idle speed set screw - 4. Throttle valve spring - 5. Throttle
valve tapered pin - 6. Throttle valve - 7. Carburettor body - 8. Pin - 9. Min. jet - 10. Float - 11. Max. jet
- 12. Float chamber
MAIN - 30
AFTER 60,000 KM
Action
Vespa S 50 2T