Which Suzuki motorcycle is credited as the first mass-produced bike with an aluminum alloy frame?

The Suzuki RG250 Gamma is credited as the first mass-produced motorcycle to use an aluminum alloy frame.

Suzuki launched the RG250 Gamma in 1983 as a lightweight, two-stroke sport motorcycle influenced by the company’s Grand Prix racing technology. Its aluminum alloy frame reduced weight while providing the rigidity needed for precise handling.

The RG250 Gamma combined a 249 cc parallel-twin engine with features unusual for a middleweight road bike, including a full fairing and a racing-inspired chassis. It helped establish the template for later Japanese lightweight sport motorcycles.

The RG250 Gamma is often confused with the Suzuki GSX-R750, which became famous for bringing an aluminum alloy frame to a larger, high-performance four-stroke superbike in 1985. The smaller RG250 Gamma preceded it by about two years.