Replacement Piston and Rings for Malossi big bore cylinder kit for Vespa, Piaggio and Aprilia 50cc 4 Stroke.  Does not fit stock cylinder. 

 

Please put the size that corresponds to the letter on your cylinder in the comments box. 

 

All Malossi cylinders - both cast-iron and aluminum - are selected by size.

 

The range goes from size 0 (smallest piston) to size D (biggest piston). Every size features an increase of 0.01 mm.

 

When ordering a piston, please carefully specify the requested size marking as follows:

 

Example

 

0     corresponds to size 0

A     corresponds to size A

B     corresponds to size B

C     corresponds to size C

D     corresponds to size D

 

 

Only cast-iron cylinders are also available in oversize as follows:

 

.40     corresponds to an increase of 0.4 mm

.80     corresponds to an increase of 0.8 mm

 

For pistons produced in the past, 0.2 mm and 0.6 mm oversizes are also available