GRAND-SPORT RACE 130 piston for VESPA POLINI / DR / MALOSSI130ccm / ZIRRI MR 2000
GRAND-SPORT RACE piston for POLINI / DR 130ccm, MALOSSI 132ccm cylinder, with D= 58mm also fits the ZIRRI MR 2000 (cast iron only!) and CAGIVA SST DR- cylinder.
Piston with modern layout and 18% sillicium alloy, 2 GRAND-SPORT 1mm steel piston rings, piston skirt with cutout and no transfer windows for your own design ideas.
Coated piston (Molybdenum / Molybdän) mit optimized emergency running properties, less friction and better running-in behavior for a longer engine lifetime.
Using 1,0mm STEEL piston rings, GRAND-SPORT RACE pistons are unique for cast iron cylinders, as no other manufacturer offer this Highend Feature!
This means higher break resistance more safety at higher engine speed and torsional stiffness as well!
Piston diameter: 57,0 / 57,5 / 58,0mm
Compression heigth: 30,5mm
Radius of piston crown: 162,35mm
Piston skirt length: 59,5mm
Pin size: 15mm
Piston ring quantity: 2
Piston ring thickness: 1mm
Scope of delivery:
1 piston with 2 rings, 1 pin and 2 clips
Possibly the cylinder has to be adjusted to the new piston/compression heigth, but not the MALOSSI 132 ccm cylinder!
- Compression heigth: POLINI / DR piston = 36,0mm,
- Compression heigth: ZIRRI piston = 32,5mm,
- Identical compression heigth with Malossi 132ccm, Malossi piston = 30,5mm.
Rings: GS1023000 / 050 / 100
Pictures might look different.