gilera runner sp50 wih malossi variator what next?

my gilera sp50 does around 45-50 destricted with a malossi variator and a gianelli performance exhaust and im wondering what next to get for it.
i wanted to get my carb upjetted but the place i asked told me they wouldnt until i probably got a 70cc kit which im not too bothered of getting at the moment.

what can i get to increase the performance of the bike as id really like to be able to put a air filter on the bike as it will ook and sound lots better insted of the standard box one which i already have?
could i still upjet and get the same performance from the bike afterwards?
or would a bigger carb be better from 17mm to about 21mm?

ive had the bike for around 2 month now and just want to make it better for performance any help thanks???

 

you should of upjetted for the exhaust. by 5%
do that and you will have a better running scooter.

oh and get a 70 kit you will love the power increase.