PIAGGIO Beverly Tourer 250 i.e. Service Station Manual page 142

Engine
not have any defect, the problem must be due to
either excessive wear or wrong machining on the
crankcase.
- Check the diameters of both the bearings of the
crankshaft in accordance with the axes and surfa-
ces shown in the figure. The half-shafts are clas-
sified in two categories Cat. 1 and Cat. 2 as shown
the chart below.
CAUTION
THE CRANKSHAFT CAN BE REUSED WHEN THE WIDTH
IS WITHIN THE STANDARD VALUES AND THE SURFACES
SHOW NO SIGNS OF SCORING.
CAUTION
WHILE OPENING THE CRANKCASES AND REMOVING
THE DRIVING SHAFT, CHECK THAT THE THREADED
SHAFT ENDS DO NOT INTERFERE WITH THE MAIN BUSH-
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
ENG - 142
Beverly Tourer 250 i.e.