Cylinder -POLINI 70 cc Alloy- Minarelli AC (vertical) – BOOSTER, BUMP50, BWS50, SLIDER50, SPY, SR50 (-1994), STUNT, ZUMA50, AMICO

Description

The POLINI 70cc ALU is the entry in the world of Polini aluminium cylinder kits.

The Polini 70 ALU is cast in the finest and thermally preferable aluminium and covered with a hard Nikasil coating. The ALU offers the finest racing technology. Amply dimensioned channel cross sections and sporty control times let it turn to over 11.000 rpm with the right components. The outlet layout has been trimmed to maximum slot width with the very attractive sawtooth technology. The ?teeth in the outlet prevent the piston rings from threading into the outlet channel.

Thanks to the thermally clearly superior aluminium, which emits the heat much better than grey cast iron, the ALU can be compressed higher and tuned more crisply.

With such speed orgies, the larger carburettor and a racing exhaust with a short resonance length is of course obligatory. The necessary tuning work is then rewarded with a speed bullet, which easily cracks the 10,000 mark.
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