Polini Corsa 70cc cylinder kit for Yamaha air cooled vertical moped engines e.g. Yamaha BWS.

The Polini Corsa 70cc kit makes approx 25-30% more power than the Polini sport. It's still cast iron which means it's very strong and can be rebored but runs at higher revs, approaching similar performance to the aluminium Malossi MHR rep kit

Realistically this is about the limit of what can be used with any degree of reliability for everyday use. As with the MHR rep 70cc kit the oil mixture should ideally be increased to 33:1 either by an adjustable ratio oil pump (see engine category) or by pre-mixing. Will also need a decent high end sports exhaust e.g. Yasuni R

Comes complete with the cylinder, piston kit, head, uprated reed petal, spark plug, rings and gaskets.

Polini 166.0074/R