I'm trying to figure out this myself but I've got so much information in my head I've confused myself

Motor: Piranha 90cc which was upgraded to 90cc High comp Piston
Then upgraded to 110cc high comp piston and 20mm shengway carb, bike ran great!.
but I'm a 6.1" 250lb guy and starting to realise that 110cc won't be enough for street use

I've got a bunch of 125 parts kicking around..... jugs....heads...pistons... half motors blah blah blah.
can I take a 125cc piston and jug with a big valve head, throw that on with my 22mm Mikuni, jet it and be off to the races??

or do i stick with the 110 and put the 22mm Mikuni on??