VESPA LX 50 Specifications download pdf (Page 17)

- Pistons and cylinders are classified into catego-

ries based on their diameter. The coupling is car-

ried out in pairs (A-A, B-B, C-C, D-D).

Characteristic

Maximum allowable run-out:

0.05 mm

Piston rings

- Alternately insert the three sealing rings into the

cylinder, in the area where it retains its original di-

ameter. Using the piston, insert the rings perpen-

dicularly to the cylinder axis.

- Measure the opening, see figure, of the sealing

rings using a thickness gauge.

- If any measurements are greater than specified,

replace the piston rings.

N.B.

BEFORE REPLACING ONLY THE PISTON RINGS, ENSURE

THAT THE CLEARANCE BETWEEN THE PISTON RINGS

AND THE PISTON RING GROOVES, AND BETWEEN THE

PISTON AND THE CYLINDER, IS AS SPECIFIED. IN ANY

CASE, NEW PISTON RINGS USED IN COMBINATION WITH

A USED CYLINDER MAY HAVE DIFFERENT BEDDING

CONDITIONS THAN THE STANDARD.

SEAL RINGS

Name

Description Dimensions Initials Quantity

1st Compression ring 39 x 1 A 0.08 ÷ 0.20

Vespa LX 50 4valvole Characteristics

CHAR - 17

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VESPA LX 50 Specifications Page 17