hey guys i just scored an oldschool z50 and wanna rebuild the tired old engine.

plans are to keep it as quite as possible but get as much power out of it as possible and have a nice revy engine.
i was thinking the following;
75cc or 88cc bore kit
high revving cam
stiffer valve springs
and a bigger carby

what do you guys think?
please add anything you think would help.

btw its just a little side project so i dont wanna blow too much money on it.