Polini Evolution Cylinder kit - Minarelli Vertical

Polini's new cylinder for the Prebug zuma is here to change the game. No need to buy a Big intake manifold! 

This kit includes a improved reed valve housing (cast into cylinder), 4 petal reed valve, 360° intake manifold for 17 to 21mm CP carbs. 

New head gasket design - copper ring style head gasket. 0.2 and 0.3mm base gaskets included to adjust squish

Dual ring piston design 

10mm wrist pin!