PIAGGIO MP3 500 i.e. SPORT Service Station Manual page 18

MP3 500 i.e. SPORT Business_LT_ ABS-ASR_EU_USA
Characteristics
(2015)
Characteristic
Crankshaft-crankcase axial clearance (H)
0.1 ÷ 0.405 mm (when cold)
Compression ratio
10.5: 1
Slot packing system
Shimming system to control compression ratio
MEASUREMENT «A» IS A PROTRUSION OR RECESS VAL-
UE OF THE PISTON CROWN COMPARED WITH THE CYL-
INDER PLANE.
MEASUREMENT «A» ALLOWS TO DETERMINE THE
THICKNESS OF THE GASKET «B» THAT HAS TO BE FIT-
TED INTO THE CYLINDER BASE IN ORDER TO RESTORE
THE COMPRESSION RATIO. THE MORE THE PLANE
FORMED BY THE PISTON CROWN PROTRUDES BEYOND
THE PLANE FORMED BY THE CYLINDER UPPER END,
THE THICKER THE GASKET TO BE USED AT THE CYLIN-
DER BASE «B» SHOULD BE. ON THE OTHER HAND, THE
MORE THE PISTON CROWN IS RECESSED INTO THE CYL-
INDER TOP PLANE, THE SMALLER THE GASKET THICK-
NESS.
Characteristic
Compression ratio
CHAR - 18