PIAGGIO B 250 - Page 19

Name Description Dimensions Initials Quantity
Oil scraper ring 57 x 1 A 0.10 ÷ 0.30
Oil scraper ring 57 x 2.5 A 0.15 ÷ 0.35
OVERSIZES MOTOR 250
Name Description Dimensions Initials Quantity
Compression ring 72 x 1.5 A 0.15 ÷ 0.30
Oil scraper ring 72 x 1 A 0.20 ÷ 0.40
Oil scraper ring 72 x 2.5 A 0.20 ÷ 0.40
Crankcase - crankshaft - connecting rod
CRANKCASE - CRANKSHAFT- CRANKSHAFT HALF-BEARINGS
Name Description Dimensions Initials Quantity
Crankshaft half-bearing Type A - red 1.970 ÷ 1.973
Crankshaft half-bearing Category B - blue 1.973 ÷ 1.976
Crankshaft half-bearing Type C - yellow 1.976 ÷ 1.979
Crankshaft class 1 -
Crankcase class 1
C - C
Crankshaft class 1 -
Crankcase class 2
B - B
Crankshaft class 2 -
Crankcase class 1
B - B
Crankshaft class 2 -
Crankcase class 2
A - A
Crankshaft Category 1 28.998 ÷ 29.004
Crankshaft Class 2 29.004 ÷ 29.010
Crankcase Category 1 32.959 ÷ 32.965
Crankcase Class 2 32.953 ÷ 32.959
Fitting clearance
Crankshaft/ crankcase axial clearance 0.15 - 0.40 mm (when cold)
CRANKSHAFT/ CRANKCASE AXIAL CLEARANCE
Name
Description Dimensions Initials Quantity
Half-shaft, transmission
side
16.6 +0-0.05 A D = 0.20 - 0.50
B 125-250 Characteristics
CHAR - 19