PIAGGIO Beverly 300 i.e., Service Station Manual, Page: 15 / 333

- Carefully clean the sealing ring housings.
- Measure the coupling clearance between the
sealing rings and the piston grooves using suitable
sensors, as shown in the diagram.
- If the clearance is greater than that indicated in
the table, replace the piston.
N.B.
MEASURE THE CLEARANCE BY INSERTING THE BLADE
OF THE FEELER THICKNESS GAUGE FROM THE SECOND
SEAL SIDE.
Fitting clearance
Top piston ring - standard coupling clearance
0.015 - 0.06 mm
Top piston ring - maximum clear-
ance allowed after use
0.07 mm
Middle piston
ring - standard coupling clearance
0.015 - 0.06 mm
Middle piston ring - maximum clearance al-
lowed after use
0.07 mm
oil scraper ring - stand-
ard coupling clearance
0.015 - 0.06 mm
oil scraper
ring - maximum clearance allowed after use
0.07 mm
- Check that the head coupling surface is not worn
or misshapen.
- Pistons and cylinders are classified according to
their diameter. The coupling must be made with
those of the same type (M-M, N-N, O-O, P-P).
Characteristic
Maximum allowable run-out:
0.05 mm
Crankcase - crankshaft - connecting rod
C
RANKSHAFT
Titolo Durata/Valore Testo Breve (< 4000 car.) Indirizzo Immagine
Crankshaft Axial clearance between
crankshaft and connecting rod
Axial clearance between crankshaft and connecting rod
Beverly Tourer 300 i.e.
Characteristics
CHAR - 15