Sounds about right for a restricted scoot. If you search on the search tab at the top of the page you will find loads of info on de-restricting your scooter. Jus limit he search in the super 8 section for best results.
I have an Agility 50, dont know if its the exact same engine, its a 50cc 4stroke, the 2 biggest gains I got were changing the variator boss and fitting a race variator, I gained around 18mph just on those 2 jobs. Also change your rollers to lighter ones, cut the cdi and upjet your carb. You should hit near 50mph on the clock then, I do, even 50+ mph downhill!