PIAGGIO 2012 MSS APE 50, Service Station Manual

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Piston ring oversizes
S
EALING RINGS
Specification Desc./Quantity
Upper seal ring (Nominal sizes) Diameter=38.40 mm
Lower seal ring (Nominal sizes) Diameter=38.40 mm
CLEARANCE UPON FITTING
Name Description Dimensions Initials Quantity
Upper sealing ring 1st Oversize 38.60 0.20 to 0.60
Lower sealing ring 1st Oversize 38.60 0.20 to 0.60
Upper sealing ring 2nd Oversize 38.80 0.20 to 0.60
Lower sealing ring 2nd Oversize 38.80 0.20 to 0.60
Upper sealing ring 3rd Oversize 39.00 0.20 to 0.60
Lower sealing ring 3rd Oversize 39.00 0.20 to 0.60
Connecting rod - roller cage fitting
CONNECTING ROD - ROLLER CAGE
Connecting rod Roller cage
1.a category 4.a category
2.a category 3.a category
3.a category 2.a category
4.a category 1.a category
CAUTION
IN CASE OF NOISE, USE CAGE OF THE CATEGORY IMMEDIATELY BELOW.
Crankshaft alignment check
With the proper equipment, check that the eccentricity of the surface of Ø "3"and "1" are contained
within 0.003 mm. (the maximum reading limit on the dial gauge clock); Also check the eccentricity of Ø
"2", which are allowed for a maximum reading of 0.02 mm. In the case of eccentricities not much greater
than that prescribed, perform the straightening of the shaft by means of counterweights with a wedge,
or tightening it in a vice (equipped with aluminium bushings) as needed, for much greater eccentricities
replace the crankshaft.
Specific tooling
020074Y Crankshaft Alignment Check Tool
MSS APE 50
Characteristics
CH - 15