PIAGGIO MSS X9 EVOLUTION 250 Workshop Manual page 130

Engine
INGS. FAILURE TO OBSERVE THIS PRECAUTION CAN
DAMAGE THE MAIN BUSHINGS.
CAUTION
KEEP THE CRANKSHAFT IN ONE OF THE TWO HALVES
OF THE CRANKCASE WHEN SEPARATING IT. IF YOU FAIL
TO DO THIS, THE CRANKSHAFT MIGHT ACCIDENTALLY
FALL.
N.B.
WHEN MEASURING THE WIDTH OF THE CRANKSHAFT,
MAKE SURE THAT THE MEASUREMENTS ARE NOT
MODIFIED BY THE RADIUSES OF FITTINGS WITH THE
CRANKSHAFT BEARINGS.
Specific tooling
020262Y Crankcase splitting strip
020335Y Magnetic support for dial gauge
Characteristic
Axial crankshaft/crankcase clearance: Stand-
ard clearance
0.15 - 0.40 mm (when cold)
Axial connecting rod - crankshaft clearance
Standard clearance
0.20 ÷ 0.50 mm
Radial connecting rod - crankshaft clearance
Standard clearance
0.036 ÷ 0.054 mm
Width of crankshaft with integral washers:
standard measurements
55.67 ÷ 55.85 mm
Crankshaft bearings: Standard diameter: Cat.
1
28.994 ÷ 29.000
Crankshaft bearings: Standard diameter: Cat.
2
29.000 ÷ 29.006
ENG - 130
MSS X9 Evolution 250