VESPA LX 125 4T Euro 3, Service Station Manual

Page: 114 / 180

- Check the radial clearance on the connecting rod.
-Check the surfaces that limit the axial clearance
are not scored and measure the width of the crank-
shaft between these surfaces, as shown in the
diagram.
CAUTION
BE CAREFUL NOT TO LET THE MEASUREMENT BE AF-
FECTED BY THE UNIONS WITH THE CRANKSHAFT ENDS.
Characteristic
Standard clearance
0.036 - 0.054 mm
- If the axial clearance between crankshaft and
crankcase is exceeding and the crankshaft does
not have any defect, the problem must be due to
either excessive wear or wrong machining on the
crankcase.
CAUTION
THE CRANKSHAFT CAN BE REUSED WHEN THE WIDTH
IS WITHIN THE STANDARD VALUES AND THE SURFACES
SHOW NO SIGNS OF SCORING.
Characteristic
Distance between the shoulders
55.67 - 55.85 mm
- Check the diameters of both the bearings of the crankshaft in accordance with the axes and surfaces
shown in the figure. The half-shafts are classified in two categories Cat. 1 and Cat. 2 as shown the chart
below.
STANDARD DIAMETER
Specification Desc./Quantity
Category 1 28.998 - 29.004
Category 2 28.004 to 29.010
Engine
Vespa LX 125 - 150 4T Euro 3
ENG - 114