Vespa LX 2012 - Page 25

Slot packing system
Characteristic
Compression ratio
(10.5±0.5):1
Measurement "A" to be taken is a value of piston re-entry, it indicates by how much the plane formed
by the piston crown falls below the plane formed by the top of the cylinder. The further the piston falls
inside the cylinder, the less the base gasket to be applied (to recover the compression ratio) and vice
versa.
N.B.
MEASUREMENT "A" MUST BE TAKEN WITHOUT ANY GASKET FITTED BETWEEN THE CRANK-
CASE AND CYLINDER AND AFTER RESETTING THE DIAL GAUGE, EQUIPPED WITH A SUP-
PORT, ON A GROUND PLANE
ENGINE 125/150 SHIMMING
Name
Measure A Thickness
Shimming 0 to -0.1 0.8 ± 0.05
Shimming -0.1 to -0.3 0.6 ± 0.05
Shimming -0.3 to -0.4 0.4 ± 0.05
Vespa LX - S 125 3V ie 150 3V ie (2012) Characteristics
CHAR - 25