Derestricted 2T is good for 40mph maybe.
No harm in taking the exhaust restriction out, but I wouldn't bother with the CDI (it stops it over-revving for a reason) and there may be a little to be gained from upjetting, but I can't imagine it would be too much.
If it's revving well already, you may not gain much top speed as the gearing is still limited by the travels of the variator and clutch!