..Welcome to the Forum!!
..there are a cpl of things that you can do to de-restrict your A50...Depending on the specific part number of your cdi, you can either clip a external wire, or cut a notch in the corner of the cdi casing, which cuts a internal wire, to derestrict the electronic rev limiter.
..also, in the cvt there may be a bushing in the variator that keeps the variator pulley halves from coming completely together...
..remove that bushing..
..these two FREE mods will give you another 5-10 mph top end...
..search through these posts in the Agility 50 board for more specific instructions, pics and some ideas for further modifications...
..there's also a cpl of links to the Agility 50 Sevice Manual, which is a MUST HAVE item for any A50 owner..
..as you go along, if you need some help, there's a lot of ppl here willing to lend a hand..
..good luck and post back!!
..hope you bust that pgo's ass!...
peace