You new to bikes mate? If you're not it will be feel like its restricted. Otherwise, best bet is to find a long private road and see what it'll run out of puff at - restricted bikes won't pull more than about 110mph tops, so if it goes past that you'll be alright!
LOL, not new to bikes just trying to iron out the issues with my Fazer, I had a bit of a break from motorbikes after a crash, but had two fazers about 10 years ago and owned Bandits and Honda X11 and various other bikes, but this just seems underpowered, once you get to 5k+rpm it just buzzes and vibrates a little and it feels like it needs to change up and ive never had it over 70mph (truth)
I've not ridden a smaller bike or restricted bike for years and years so dont if its a technical thing or if it is restricted and I just wasnt told.
Pretty sure air filter in good condition as checked it last week although i could think its clean and others might say its past its best.
Ive not pushed it overly hard as due to where i work and live theres not too many open roads, just feel un easy taking it on motorway due to how it feels