PIAGGIO B 250 - Page 18

Name Initials Cylinder Piston Play on fitting
Cylinder 2nd Oversize A2 57.397 ÷ 57.404 57.345 ÷ 57.352 0.045 - 0.059
Cylinder 2nd Oversize B 2 57.404 ÷ 57.411 57.352 ÷ 57.359 0.045 - 0.059
Piston 2nd Oversize C 2 57.411 ÷ 57.418 57.359 ÷ 57.366 0.045 - 0.059
Piston 2nd Oversize D 2 57.418 ÷ 57.425 57.366 ÷ 57.373 0.045 - 0.059
Cylinder 3rd Oversize A 3 57.597 ÷ 57.604 57.545 ÷ 57.552 0.045 - 0.059
Cylinder 3rd Oversize B 3 57.604 ÷ 57.611 57.552 ÷ 57.559 0.045 - 0.059
Piston 3rd Oversize C 3 57.611 ÷ 57.618 57.559 ÷ 57.566 0.045 - 0.059
Piston 3rd Oversize D 3 57.618 ÷ 57.625 57.566 ÷ 57.573 0.045 - 0.059
COUPLING CATEGORIES ENGINE 250
Name
Initials Cylinder Piston Play on fitting
Cylinder / piston A 71.990 ÷ 71.997 71.953 ÷ 71.960 0.030 - 0.044
Cylinder / piston B 71.997 ÷ 72.004 71.960 ÷ 71.967 0.030 - 0.044
Cylinder / piston C 72.004 ÷ 72.011 71.967 ÷ 71.974 0.030 - 0.044
Cylinder / piston D 72.011 ÷ 72.018 71.974 ÷ 71.981 0.030 - 0.044
Piston rings
UPRATING TABLE MOTOR 125
Name
Description Dimensions Initials Quantity
Compression ring 57 x 1 A 0.15 ÷ 0.30
Characteristics B 125-250
CHAR - 18