Saw this amazing Norton-JAP (J.A. Prestwich) in a British classic motorcycle mag a few months ago. After trying to find some more info on it I discovered a detailed article on The Vintagent (If you haven’t checked this site out it’s a must). This bike has had an impressive history on and off the track over the years. Here’s some technical info straight from the story “Although it is based on the ‘Stronger’ 1100cc JAP mk2 Crankcases, it is fitted with 2 Speedway heads and barrels giving a nominal 998cc. The GP carbs are in fact 1 1/4″ and the SU floats came from an XK Jaguar. It runs on straight Methanol and gives circa 100 BHP. The JAP is mounted in a 1952 350cc Manx Norton rolling chassis (the 350 version is lighter than the 500 being made in lighter gauge tubing).” For the full story on this beautiful machine check out the wonderful The Vintagent.