Fault Finding - VESPA 90 Operation And Maintenance

FAULT FINDING
If the machine does not run properly, inspect and rectify as explained below.
If thesuggested
remedies are not sufficient
to eliminate the trouble, the customer should not try to carry out operations but approach an authorised Vespa Dealer.
who has the necessary facilities to undertake this work.
32 -
Fault finding
Remedies
HARD STARTING
I.. - Fuel system - Carburation. Ignition
Lack of fuel.
Turn to Reserve and refill as soon as possible.
Filter, jets. fuel tap, carburettor body dogged or dirty.
Remove, wash in petrol and blow dry.
Engine flooding. Air cleaner choked or dirty.
See page 16.
Sparking plug dirty a Porcelain of sparking plug cracked.
Disconnect the plug lead. Check if sparking occurs between lead
and crankcase when the kickstarter is operated.
Breaker points dirty. worn or pitted; gap between breaker points Consult your Dealer.
incorrect.
VARIOUS RUNNING DEFECTS
I. - Lack of power
Silencer choked.
Clean (see page 25).
Cylinder head joint or sparkplug loose.
Position head correctly and tighten nuts uniformly; tighten spark
plug with plug spanner.
2. .. Silencer or carburettor.
Check the sparking plug, clean, change or set the electrode gap
Back-firing. (see page 38).