Right, is it just me or do people seem to think that only 2 bikes exist, there are more bikes out there than the RS125 and ZXR400. When I was 12 I started riding off road on a CR85 big wheel, at 14 I changed that to a KX125. At 16 I was allowed to ride on the road

so I got a Peugeot Trekker 50cc scooter, which I bought de-restricted, at 17 I traded this for a Hyosung XRX125 I did my test and a month later a woman pulled out in front of me and wrote off my bike.
After 6 months recovering I got some insurance money and bought a KDX200 and a KLX250, I used them both to race enduro and both on the road, although I did end up favouring the KDX as it was completely mental. Then I sold both bikes and bought a Honda CRX (car). After a year of driving the CRX on the road and track I sold it. 6 months or so later I bought the ZXR400 and I also have a GPZ500 I am going to sort out for the missus (one day soon I promise

).
What I am trying to say is although I had been riding off road, which teaches you very quickly how to control a bike, when I started riding on the road I had to learn a whole new set of skills. I crashed my Hyosung god knows how many times and learnt from each one, then I had the Hyosungs final crash ,RIP. The same with the KDX I crashed through hundreds of fences and hedges, much to the suprise of many a cow. If I had been on a sports bike I would have cost myself thousands of pounds, instead I just straightened my handle bars each time.
And you know what the bike that taught me the most was the KDX, it taught me to antisipated traffic, wheelie, slide the back end, what to do when you hit the power band mid corner, how to prepare for safe overtakes, what to do when the front lifts over the smallest bump in the road, how to talk my way out of dangerous driving fines and even how to get my knee down, thats right knee down on an enduro bike.
My advise is do your test, sell the RS and buy either a 250-400cc trail bike, or a 400-500cc commuter like an ER or CB, you will learn so much about carrying corner speed how to antisipate other drivers, what a bike can/can't do and more importantly what you can/can't do. You may not look as cool but when you crash it and you will crash it you won't have to shell out as much to fix it and so you will get a better return when you come to sell it.
And as for saying a bike is restricted when its not, the police won't care, but your insurance will, if you have a crash the first thing they will do is check for the restrictors if they are missing you will invalidate your insurance, which will result in an IN10 and 6 points on your licence. Also if you hit someone and really hurt them and you aren't insured they can sue you personally, let alone having to live with the fact you hurt someone and they can't get the help they need to recover because you aren't insured, and all just for the sake of a few extra horses.
Think about it we never stop learning, so take your time to learn properly.