Modern Buddy

Hi hopefully someone may have done this.
Here in UK Stella come's as a 125. I have upgraded to 150.
Since then I have been slowly buying new parts as funds allow to fit a bgm 177 kit.
I have to change the petal's on reed valve soon so whilst carb is off can I fit the 24/24 carb whilst it still has the 150cc set up on it?
If so what jetting/ mixture tube etc as a starting point?
The carb in question is new and jetting set up for px 200 so I have been informed not checked the size's myself.
It is running a sito exhaust with no cat and air filter mod was done before I got it.
Many thanks in advance 😊

I have a 24/24 on a stock 150cc.

Nothing but headache on tuning.

Stick with stock.

55/160 idle, 160AC be3, and 105 main jet, check main jetting.

Thankyou for that, I shall stick with the original 20/20 and jet accordingly.