The variator may have a limiter on it that you can remove. Go to scootertherapy.com, they have an article with pics on how to do it to an Elite. Your variator may have the same type of restrictor on it.
I don't know how much top end that will add, because I had to replace a belt within a week of doing that mod, and I noticed a much bigger difference with the new belt (8-10 mph)... I'd expect around 5 mph better.