Scooterotica

Hi guys,
I've already posted on the LCGB forum but I don't know exactly where to ask my questions...
I'm thinking about buying a Gori 200 race kit for my Li 125 series 1.
Do I have to change the front sprocket and the chain (number of teeth) ?
I have to change the crank too ?
And what would be the best exhaust to keep the series 1 look please ?
Thanks for all your advices.
Cheers from France.
JB

It's probably a good idea to look at the gearing. You can change the gearbox or swap sprockets to get what you need. Probably a GP crank would be wise too.