Scooterotica

Rapidos have big sweeps inside the barrel transfers compared to a cast iron....and come with tight piston clearances and insufficient blow down.....they still need reworking.

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Hi Dan what do you mean by big sweeps in the transfers and the comparison of them to a cast iron design.
the race version of the rapido has higher ex duration and makes blowdown ok for a std kit but like most cylinders you can always find improvements
the clearances are a bit tight and not consistent along the length of the bore so a hone to size is required of which af would do for you,theres a few piston options mahle and asso of which are ok and a substitute could be requested as an exchange if you want to go for a thin ring piston