This project was originally started by Francis Beart in 1958 and built for Mike Hailwood originally with an AJS 7r engine.
Toward the end of 1959 the project was taken over by Clive Waye who decide (probably due to good fortune and discussion with rider Chris Williams) to fit a bigger G50 engine. The engine came from a Matchless G50 campaigned by a rider call Ned Minihan who used the bike to finish 3rd in the Manx GP that year, the G50 was number 3 of the 1st batch of 9 bikes produced. Around the same time the front brake was changed (may have been fitted originally, it's a detail I cannot clarify) which came from a E90 Porcupine C1949. In 1961 the bike was sold to the current owner, pictured on the bike at the 1962 TT for the sum of £500 - a small fortune in 1961.
To put the bike into some sort of context in 1958 the Manx chassis was about as good as it got, the G50 engine was pretty much state of the art 500cc GP engine - today it would be like fitting a Moto GP Honda engine into a Movistar Yamaha Chassis.
The exhaust will be reused.