Gilera GP 800 i.e. - Slot Packing System

- Check that the rocking lever pins exhibit no scores or wear.
Characteristic
Standard diameter:
13 - 0.010 -0.018 mm
- Measure the inside diameter of each rocking lev-
er.
Characteristic
Standard diameter:
13 + 0.026 +0.015 mm
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.
Characteristic
Compression ratio
10.5 ± 0.5 : 1
BASE GASKET THICKNESS
Name Measure A Thickness
«A» MEASURE TAKEN - 0.185 - - 0.10 0.4 ± 0.05
«A» MEASURE TAKEN - 0.10 - + 0.10 0.6 ± 0.05
«A» MEASURE TAKEN + 0.10 ÷ + 0.185 0.8 ± 0.05
N.B.
VALUES INDICATED WITH «-» REFER TO PISTON CROWN RECESSES WITH RESPECT TO THE
CYLINDER PLANE.
N.B.
DISTANCE «A» MUST BE MEASURED WITHOUT ANY GASKET FITTED AT «B»
GP 800 i.e. Characteristics
CHAR - 29