15-11-11, 10:09 PM
You don't need a certificate or frame sticker. Theres nothing in any laws that says you do, the majority of insurance company's don't ask for a certificate. You can if you have the facilities make your own restrictors there's someone on ebay sellin them for 32 quid with a "certificate" for piece of mind. Long story short - don't spend 200 quid on a restrictor just to get a piece of paper.