aluminium cylinder ø 56 pin ø 13 for polini xp 4s 4t (156fmi) 125 cc

Description

TECHNICAL FEATURES

Cylinder
- Material: Aluminium alloy with high content of silicon, hardened and tempered, silicon carbide and galvanised nickel coated cylinder sleeves, diamond honed surface finished with a double criss-cross pattern while maintaining extremely tight tolerances.
- High precision numerical controlled machining.
- Cylinder-Piston matched sets within 0.05 mm.
- Heat exchange surfaces redesigned and increased.



Piston
- Ultra compact with 3 piston rings.
- Material: Special aluminium-silicon alloy with low thermal expansion and selective tin deposition onto piston skirt areas.
- High precision numerical controlled machining.
- Reinforced and lightened.
- Heat exchange surfaces increased.


Piston rings

- Special low friction with high mechanical strength.
- Top compression ring made of chrome plated nitrided steel.
- 2nd compression ring made of special cast iron.
- Three-piece oil control ring made of chrome plated special steel alloy.

NB: considering the difficulty in indentifying the engine manufacturer in certain vehicles, we suggest to carefully verify stroke, pin diameter and mounting stud pattern before purchasing Malossi products.

Products reserved exclusively for racing in specifically designed locations according to the provisions of the competent sporting authorities. We disclaim all liability for improper use