PIAGGIO Liberty 50 4T, Manual

Page: 48 / 64

I
GNITION IRREGULARITY
No spark from spark plug. Due to
the presence of high voltage, this
check should only be carried out by
an expert. Check that the electrodes are
properly adjusted (0.7÷ 0.8 mm).
Check that the electrodes are
clean (clean with pure petrol and
metal brush or with emery cloth).
Check the spark plug insulator:
Replace the spark plug if the
insulator is cracked or broken. If
the spark plug is in good condition,
contact an
Authorised Piaggio
Service Centre.
P
OOR COMPRESSION
Spark plug loose. Loose cylinder
head, worn piston retaining rings.
Incorrect valve clearance Contact an Authorised Piaggio
Service Centre
HIGH CONSUMPTION AND LOW PERFORMANCE
Air filter blocked or dirty. Clean with water and shampoo and
impregnate with petrol and specific
oil («Air filter removal» section)
48
3 Maintenance