Sacramento Valley VJMC

07/29/2026

Great show with some great bikes. Until next year Scott’s Valley!

07/05/2026

07/03/2026

by CycleDrag

07/02/2026

Was this the ultimate twin?

06/18/2026

06/12/2026

California Rally

06/12/2026

California Rally

Calendar

05/31/2026

The 1977–1978 Yamaha RD400 represents the golden height of the air-cooled, two-stroke street machine before emissions laws pushed the industry toward four-stroke engines. Evolving from the legendary RD350, the RD400 series (specifically the RD400D in 1977 and RD400E in 1978) was built as a lightweight, sharp-handling "giant killer" capable of outperforming contemporary four-stroke bikes with twice the displacement.

The RD400 is often regarded as the final and best-developed air-cooled Yamaha two-stroke street motorcycle before stricter emissions regulations led to the decline of large-displacement two-strokes. Today, it remains one of the most collectible Japanese classic motorcycles of the 1970s, especially among enthusiasts of vintage performance machines.