The Thor 190 Evo from Polini is a powerful two-stroke engine with “an excellent power-to-weight ratio”. The 193cc two-stroke engine weighs just 13.6kg. There are lots of design improvements, listed below, and it’s available in different versions with centrifugal clutch and electric start options. Piston with new profile, that improves the performance and reduce the wear of […] …read more
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