Your bike must have a green sticker from CARB for it to be street legal. If it isn't a green model, you'll be unable to convert it to a street-legal dirt bike, regardless of any alterations you make ...

It’s got everything you’d want from a lightweight hooligan bike—except ... the Street Moto costs quite a pretty penny. The base model, for starters, carries a sticker price of £9,995 ...