Trick 50cc Peugeot

Hi Guys, Can you help me? (stupid question!)
I’m looking to buy a Peugeot Vivacity Silver Sport (australian model) and do it up as a 50cc racer. Can you suggest to me the best ways of improving the motor out put (ie exhaust) and any other performance products like tyres and stuff to make it trick.
Cheers PeterAustralia