It’s Here.. Well, There.
When you take a modern aluminum frame and stick a CR 500 motor in it, you have a 500 AF. When you take that Yamaha 450 chassis and put a 1985 CR 500 motor with Fuel Injection in it, you get a YZR 500FI. Check it out!
Click Here to read the article from Dirt Rider Downunder. Pages 46-51