Cylinder-Piston Oversizes - PIAGGIO Ape Workshop Manual

Characteristics
S
Name
Shoulder ring
Shoulder ring
Shoulder ring
Shoulder ring
For the clearance check, use the specific equipment.
N.B.
IF YOU DO NOT GET THE CLEARANCE "A" WITH SHOULDER RING "B", REPLACE THE LATTER
WITH A RING LARGE ENOUGH TO GET THE REQUIRED CLEARANCE.
Specific tooling
T.0060824 Control probe axle clearance gear change

Cylinder-piston oversizes

FITTING CLEARANCES
Pistons and cylinders supplied as spare parts by the Manufacturer are marked with the letters of the
alphabet. When both pistons and cylinders are replaced, the pieces with the same letter must be
matched.
Specification
Normal cylinder nominal sizes
Normal piston nominal sizes
Name
Coupling:
Coupling:
Coupling:
CH - 20
- CLEARANCE "A" UPON FITTING
HOULDER RING
Description Dimensions
1st Oversize 1.1 +0 -0.06
2nd Oversize 1.2 +0 -0.06
3rd Oversize 1.3 +0 -0.06
4th Oversize 1.5 +0 -0.06
NORMAL CYLINDER- PISTON NOMINAL SIZES
CYLINDER COUPLING - PISTON
Initials
1st Oversize 68.20 to 68.22
2nd Oversize 68.40 to 68.42
3rd Oversize 68.60 to 68.62
Initials
Desc./Quantity
E=68 +0.025 - -0.005
C=67.76 +0.025 -0.005
Cylinder Piston
67.96 to 67.98
68.16 to 68.18
68.36 to 68.38
APE TM Benzina
Quantity
0.15 to 0.50
0.15 to 0.50
0.15 to 0.50
0.15 to 0.50
Play on fitting
0.24
0.24
0.24