hey guys, doing some research. what's the technical term for the stacked transfer ports? googling that term didn't bring much info. what do these do? at bdc they wouldn't be letting more fresh charge into cylinder in the same manner as main transfers. just to help cool the piston or what is the advantage of these? i've seen them on a fair amount of french kits and also the puch autisa 47mm reed cylinder so it's not just a piston port thing. two stroke tuners handbook didn't mention them from what i can tell.
sorry for zombie thread, just interested in this kit + some porting knowledge.