Crankshaft timings?

hey!

 

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[;)]

hey!

Sure, I'm using a Polini 177 and a Koso PWK 26mm powerjeted trough a scootrs manifold.

 

Thank you ;)

Hi dude

 

can you tell me wich cylinder an carburator you are using ??

 

 

cheers

hi dude

 

please set your ignition timing to 19 degrees to run perfectly ...

 

 

 

cheers

 

 

And can I open the rotary valve up to 40mm as Polini recommends?

Hi dude

 

please open the rotary as you can see it in the instructions.

It should be 2 mills on every side.

 

 

cheers