Gilera Fuoco 500 - Slot Packing System

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
DISTANCE «A» IS A PROTRUSION OR RE-
CESS VALUE OF THE PISTON CROWN WITH
RESPECT TO THE CYLINDER PLANE.
DISTANCE «A» HELPS DETERMINE THE
THICKNESS OF GASKET «B» THAT HAS TO
BE FITTED TO THE CYLINDER HEAD IN OR-
DER TO RESTORE COMPRESSION RATIO.
BASE GASKET «B» MUST BE THICKER THE
MORE THE PLANE FORMED BY THE PISTON
TOP PROTRUDES FROM THE PLANE
FORMED BY THE CYLINDER HEAD. ON THE
OTHER HAND, THE MORE THE PISTON TOP IS
RECESSED INTO THE CYLINDER TOP PLANE,
THE SMALLER THE GASKET THICKNESS.
Characteristics Fuoco 500 i.e.
CHAR - 14