what do you think ? diagnosis

right, ive got a piaggio nrg (mc3) on a 52 plate with the following upgrades Stage 6 Sports clutch
Stage 6 Sports Exhaust ( rusty but works like new)
Stage 6 Sports kit
Stage 6 Sports varitor
Stage 6 Rollers
Stage 6 jets
Polini Clutch springs
Polini paint job
Polini customized Seat
Lexus light
Small air box
malissio filter
new spark plug form late last year
has mirrors
Speed 65-70+
Chrome blue handle bar grips
malissio kelvar belt

i know you dont need to know the styling bits but just copyed and pasted it,
the bikes accelaration isnt what it should be, it just seems as if the wheel takes ages to respond to the throttle, i took the filter out the air box and it works a little better, without the air box on at all its fine, ( obviously cant use it like that thou) it also uses loads of petrol!
could anybody think what it could be ?
i think the jet is 89, im thinking its the fuel to air ratio? i think i could just get a open air filter but then the bike would still be drinking petrol too much, do you think downjetting could help? what do you think it could be ? please help!
by the way after about 5 seconds and the bike gets going its fine! its rapid but its just getting going... also the engine doesnt sound too good accelarating but like i said once it gets going its mint
ANY advise would be very appretiated THANKS!

 

You're either too rich or the rollers are to heavy. Possibly both.

What weight rollers do you have?

 

5.5 I think, so either lighter rollers or downjet it?