What restrictions are there?

[Aprilia Nick]

Curious what resrtictions are on the 2009 sr50 r factory with purejet motor. My rpm's wont go passed 8,000 and I have a Leo vince exaust and clutck kit.It only goes 40mph on flat ground and 45mph down hill, stock I was told will go 52mph(WTH) you call these performance up grades( NOT ) any help would be appreciated.

[RedParachute]

I would imagine its restricted like all Aprilia SR-50s. For complete destricting info, go here:http://www.apriliaforum.com/forums/s...ead.php?t=8617.