Who made the first successful aluminum frame? Was it Honda in 1997 or someone else?
Greeves aluminum down tube from the 1950s.
Almost 60 years ago there was a motocross bike with an aluminum frame (at least one-half of the frame was aluminum). The 1953 Greeves used a cast aluminum head tube and down tube in their Villiers-powered motocross bikes. But, the first, all-aluminum, monocoque, motocross bike was the British-built Hagon that Vic Eastwood raced in 1977. It used a Yamaha TT500 or XT500 engine.