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Polini offers the Polini 94cc Big Evolution cylinder kit. This cylinder kit is technically very different from the old Evo 2, it requires a 44mm stroke crankshaft and 85mm connecting rod. The cylinder contains 6 transfers and is equipped with an exhaust barrette. It is equipped with a mono-segment piston with 2 lubrication holes at the level of the bar and is 52mm in diameter with a 13mm axis.
* Attention: The exit angle of the exhaust ball joint is not the same as original, so it can only be fitted with the Polini 94cc Evolution exhaust*
*Warning: Like the other kits in this category, you must mill the lower engine to be able to install the crankshaft and the cylinder.*