Piaggio zip problem!! Bogging issue ? Jetting? Other?

I have a piaggio zip 12 plate that had variator spacer removed

Running all fine would sometimes bog due to spark plug but when changed was okay
Anyway
Deristricted and Got a leo vince tt exhaust for it to make it a lil faster and some stage 6rollers (4.0g - 5.5)and polini jets (60-78) with it and put 5.5s as they are ok and a 68 jet in along with the blue TT springs that come with exhaust but my bike runs "ok" on little throttle and ticks over but when pulled fully back and acctually riding it going say 15-20mph it will bog but seems try to pick up speed but is really boggy then go slower (less throttle) its okay but still boggy ? Can workout what could this be ive tryed 5.0g rollers and 70jetband lowers jets?

PLEASE HELP!! Cant ride my bike anywhere!!
Thanks

 

when changing the exhaust, you have to go through the jetting procedure to get the setup right.
Start with the biggest jet in the pack and work down until you get the right one. Patience is your friend.
You may well need the next size pack to get it spot on (72-100)
Err on the rich side, a nice dark ginger colour on the spark plug.