restricted

I've done about a third of my required reading for new members, I did have a question, I'm looking for a bike now how do I tell if it's a restricted model or not, is a number on the Vin I should look for or something else

hi i got a jap v max , bought vboost manifolds, carbs, servo etc . V boost opens at 6000 but there is some sort of rev limiter kickin in . also need to change stock 190 kph sppeedo for 260 one different connections reed switch ect. Has anyone out there modified a jap spec max and if so what...