VESPA Primavera S Manual page 94

Ignition/ injection control unit
defective. Due to the presence of
high voltage, this check should
only be carried out by an expert
LACK OF COMPRESSION
Loose spark plug
Cylinder head loose, piston gas
rings worn
Valve stuck
HIGH FUEL CONSUMPTION AND BAD
PERFORMANCE
Clogged or dirty air filter
INSUFFICIENT BRAKING
Disc greasiness. Worn brake pads.
Faulty braking system. Air in the
front and rear brake circuits
Contact an Authorised Service
Centre.
Screw in the spark plug tightly
Contact an Authorised Service
Centre.
Contact an Authorised Service
Centre.
Try to blow out with compressed
air, otherwise replace the filter
Contact an Authorised Service
Centre.
94