All Malossi and aluminum cylinders are divided into selection classes.
It goes from selection 0 (smallest piston) to selection D (largest piston). Each selection change equates to an increase of 0.01mm.
At the moment of your order, you carefully check the selection as an example below:
Example
34 3448 equals selection 0
34 3448.A0 equals selection A
34 3448.B0 equals selection B
34 3448.C0 equals selection C
34 3448.D0 equals selection D
Only for iron cylinders the following oversized diameters are available:
34 3448.40 equals 0.4 mm increment
34 3448.80 equals 0.8 mm increment
For less recent production pistons the oversized diameters 0.2 mm - 0.6 mm are also available (eg 34 3448.20 - 34 4375.60).
All Malossi cylinders are selected and present the selection number, month and year of control.
All Malossi pistons indicate the selection letter or number.
The piston has to be inserted into the cylinder with the arrow pointing towards the exhaust.
Products reserved exclusively for competitions in the places intended for them according to the provisions of the competent sports authorities. We decline all responsibility for inappropriate use


APPLICATIONS OF THIS PRODUCT:
According to the data provided by the manufacturer, this article is compatible with the following brands, models and years:
VESPA VESPA PE 1977-1997