Hitchkins

I really need help with derestricting my Yamaha Aerox 50cc 2009 Urgently. Im wanting to get this technigas exhaust for £105 which is horizontal (does that make any difference ? , and i found some POLINI VARIATOR ROLLER WEIGHTS 15 X 12 - 4.7 GR,im hoping to make it go as fast as it can do i need lighter rollers than 4.7 or should they be okay. thanks Andy

Ive recently purchased a Yamaha Aerox YQ50 2009 model. I am wanting to derestrict my moped and I am about to buy a new exhaust LEO VINCE ZX CHROME EXHAUST ( http://www.adrenalin-pedstop.co.uk/p/LEO-VINCE-ZX-CHROME-EXHAUST-FO-1400.aspx.) However i am not sure what else i will need to keep it running with a sports exhaust , i should think i will need new rollers but i have no clue what weight i will need , My mates have also said about 3 springs. If anyone could help me please post on this thread it will be very much appreciated Thanks Andy.