more derbi content... a couple questions

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pertaining to the differances between pyramid, flat reed, and piston ported engines..

i have a couple pyramid style engines that im about to rebuild..

i was wondering if i would be able to swap all the contents of a pyramid style engine into a flat reed case? i know the stroke length is different, but isnt that determined by the front end of the engine.. crank, mounting block.. etc..? wouldnt all the internal gears be the same?

also, not to sound like an asshole but my laguna sport (which is casually for $ale) has a piston port engine.... whats the stroke length of the piston port?

and lastly, any speculation about

why the pyramid kits look so inferior and less aggressive than the flat reed?

pyramid:

flat reed:

alos..anyone have a trashed flat reed engine? or cases that i can experiment around with? c.judemc@gmail.com

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