Son is 17, holding restricted A license, currently riding on SV650 un-restricted. Naughty boy, but knows fucking everything, so you can't tell him owt, however, not doing too much riding in this weather anyway (it's cold....whimp !) Do I need a certificate to say the bike has been restricted, or will a dyno run showing bike output suffice ? or do I need anything ? (Cos I'm going to buy 2nd hand kit from Christofire, but he may not have the certificate) The insurance company have not asked for any proof, and my understanding is that it is a legal requirement to have the bike restricted, but no legal requirement to have a certificate. or Do I need a to obtain dyno run output as proof ? Cheers