Crankshaft help please

Hi

 

I'm building a kinda racer engine.

setup:

 

130cc polini mono

24mm reedvalve carbu

 

but i'm searching for a crankshaft. 

Can I use a 24mm/25mm crankshaft without buying a vespatronic of parmakit or...?  Does a flywheel from 20/20mm fit on this crankshaft? because I don't see any flywheels with 24/25mm on SIP..

 

http://www.sip-scootershop.com/EN/Products/46090000/Flowed+Crankshaft+SERIE+PRO+.aspx

http://www.sip-scootershop.com/EN/Products/45091000/Racing+Crankshaft+MAZZUCCHELLI+.aspx

 

Whitch crankshaft would be the best for my setup?

 

thanks!

 

greetz

cedric