Here it is, the latest version of Polinis EVO cylinder kit.
Compared to its forerunner the port areas are remarkably grown. In conjunction with the optimzed port timing the EVO 2 gains even more power. The exhaust port is now split into three areas.
The diameter of bore is 47.6 mm as usual in the 70 cc class.
Compared to the forerunner the EVO 2 gains 1 hp more and achieves 23 hp (according to Polini).
If you achieve this kind of power the engine used should be in a tip top condition. Especially the crank is very stressed and should be very high quality. Our recommendation is the BGM Evolution crank (item number BGM034023).
Because of the awesome long delivery time of Gilardoni, Polini made the decision to cast and plate the cylinders themself. The result is very impressing, quality and finish are superlative!
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