PIAGGIO X9 Evolution 500 - Page 17

Diameter of crankshaft bearings.
Measure the capacity on both axes x-y.
CRANKSHAFT
Specification Desc./Quantity
Cat. 1 Standard diameter: 40.010 ÷ 40.016
Cat. 2 Standard diameter: 40.016 ÷ 40.022
Crankshaft alignment
Specific tooling
020335Y Magnetic support for dial gauge
MAX. ADMISSIBLE DISPLACEMENT
Specification
Desc./Quantity
A = 0.15 mm
B = 0.010 mm
C = 0.010 mm
D = 0.10 mm
Crankcase / countershaft coupling
Besides considering it should match the crankshaft, the crankcase is chosen according to the centre
to centre distance between the seat of the crankshaft and that of the contra-rotating shaft.
Both the centre to centre distance and the pair of gears driving the contra-rotating shaft are divided into
two types (A and B) to be matched (A with A and B with B).
This selection is useful to keep the difference between the working distance of the gears and their
distance without clearance at a given value in order to avoid abnormal noise.
TYPE A
Specification
Desc./Quantity
Centre to centre distance of the gears without clearance 76.937 ÷ 76.867
Centre to centre distance on the crankcase 77.022 ÷ 76.992
TYPE B
Specification
Desc./Quantity
Centre to centre distance of the gears without clearance 76.907 ÷ 76.837
X9 Evolution 500 Characteristics
CHAR - 17