This 1979 Yamaha RD400 reimagines a two-stroke icon through the lens of modern craftsmanship, emerging from a meticulous three-year commission by Gaston Motorcycle Werks in North Carolina. The result is a purpose-built street tracker that balances vintage character with contemporary performance engineering.
At its core lies a fully rebuilt 398cc air-cooled parallel-twin, a powerplant revered for its sharp throttle response and unmistakable exhaust note. Here, it’s elevated with DG radial cylinder heads, Lectron carburetors, and VForce3 reed valves, complemented by an expansion-chamber exhaust and upgraded electronic ignition.
The rebuilt crankshaft ensures durability, while a custom oil tank neatly integrated within the frame underscores the build’s attention to detail. Power is delivered through a six-speed transmission, preserving the RD400’s lively, rev-hungry nature.
Visually, the bike is striking yet cohesive. A powder-coated blue frame and bespoke swingarm contrast against silver bodywork accented with white panels. The 2.4-gallon tank and flat-track-inspired tail section emphasize its racing DNA, while an Airtech solo seat—finished in diamond-stitched weather-resistant suede—adds both texture and functionality.
The chassis setup is equally considered. A Ceriani conventional fork pairs with a YSS monoshock conversion at the rear, modernizing handling dynamics. Borrani 18-inch alloy rims, laced to a Robinson four-leading-shoe front drum and a Yamaha rear hub, are wrapped in Heidenau rubber, blending classic aesthetics with capable road manners.
Premium controls and electronics—from Motogadget instrumentation to Magura and Domino components—complete a build that is as technically refined as it is visually compelling.
1979 Yamaha RD400 Street Tracker By Gaston Motorcycle Werks – Image Gallery
Source: Bring a Trailer
