I bought a Serie Pro longstroke crankshaft for a PX125 with rotary valve (http://www.sip-scootershop.com/EN/Products/46003000/Longstroke+lip+crankshaft+Vespa+PX.aspx)
and wanted to know if anyone could give me the timings of it?
I don't have a degreed disc at the moment, and I'm wondering if I can open the rotary valve the 4mm up and down as Polini recommends for the Polini177. I was aiming for 185º/190º of inlet timing, but without "asfixianting" the 26mm carb I'm mounting.
Any help is welcome[;)]