what jet should i use ??? help

i have a 139qmb engine stock 50cc stock carb and im getting 45mph on stock jet

but i have a polini free flow filter and stage 6 exhaust on it and i need to upjet,

im thinking about going from stock jet to #88

i need opinions

and before you ask I DONT KNOW THE MAIN STOCK JET SIZE,

all i know its in the 70's

 

how about this.........
go read the other gazillion threads about jetting.... they may help....

 

i need to know if it is the same principle for my carb

 

ITS THE SAME PRINCIPAL FOR EVERY CARB !

 

All carbs are the same. They only know one thing. How much air is going through them. It's up to you to give the engine what it needs.
- I would sell your Polini filter to some other fool, keep your original airbox - put your new pipe on and start with a 75/80 jet - and see what the plug looks like.
Putting a sponge filter on a scoot with a standard engine is a waste of time and petrol - and it's also a good way to wreck your engine if you don't know what you're doing.
The real issue you will have is rollers. You will need lighter ones.

 

is there anything else which i need to take note of ?

 

http://www.scootershack.co.uk/threads/i-bought-an-aerox-fitted-a-pipe-now-it-doesent-run.17310/
Some advice here. Do some searching on the forums.
And some here:
http://www.scootershack.co.uk/threads/carbs-what-is-what.32724/#post-309009