Modern Vespa

Hello let me introduce myself first, my name is Davon i am 17 years old and have been messing with PK's since i was 15.

I never got on a forum because i did not really need to but with my new build i really need some help, i want to know the port timing on a polini 130cc kit and if i can use a longer stroke crank, something like a 53-54mm stroke for extra power down low, but if there is a good way to clean the crank i have now i should probably use that because of my bank account XD.

the stup is:
-Polini 130cc with evo head
-28-30mm VMC reedvalve intake
-28mm Stage6 R/T carb
-Egig python S
-27/69 (2,56) primary's
-mazzucchelli 51mm sports crank
- i have also moddified the cases alot and i am still working on those

Due to some previous mistakes i wil have to get the cilinder redone to 58mm (this is just a small portion of the spiral from the last year or so).

if you guys could help me that would be great, in my erea everyone seems to love the bike but no one can help me so it's pretty difficult at times.

(also sorry for my broken english at times)


a picture of my PK named Wappie, it's dutch slang for crazy

You should ask Egig on the timings…

I would match the timings to the python S exhaust…

Your setup seems fun! Would love to see it running!!

Thanks it's been a big journey to this point and i have had alot of setups,

50cc stock,
75cc polini, 18/67 primary's 20.20 carb and sito plus,
125 et3 kit, 24/72 primary's 20.20 carb and bgm big box,
and now this!


The recommended timing for the exhaust are 120-125°/170-178°.
I was wondering if the cilinder needed to be moddified or not, if so i wil likely get that done after i've done about 500km on the new build so it can go on a dyno and be setup perfect.