As such, it goes without saying the mastermind needed one seriously rad piece of machinery to stand out among these fellow enthusiasts. For this ambitious undertaking, the Japanese moto wizard’s weapon of choice was a 35th Anniversary Edition SR400 from 2013. Look, Yamaha’s commuter-friendly baby isn’t exactly what you’d call a vicious beast, but it’ll certainly do the trick!
This bad boy is put in motion by a four-stroke SOHC single-cylinder powerplant, with two valves and a compression ratio of 8.5:1. SR400’s air-cooled mill has a generous displacement of 399cc. At around 7,000 rpm, the engine is capable of producing up to 27 hp, accompanied by a torque output of just over 21 pound-feet (29 Nm) at 6,500 revs. A five-speed transmission channels this force to the rear 18-inch wheel by means of a chain final drive.
SR400’ss powertrain components are nested inside a steel double cradle frame, which is supported by 35 mm (1.38 inches) telescopic forks at the front. Suspension duties are handled by a double-sided swingarm and dual shock absorbers on the opposite end. The whole structure has a wet weight of just 384 lbs (174 kg).
As to Yutaka Ohashi’s spectacular one-off exploit, things kicked off in the performance sector. The folks over at Green Tea Bike Studio were tasked with an extensive engine rebuild that'll have it perform like a marvel. Besides tweaking the mill’s crankshaft and increasing its displacement all the way up to 505cc, the powerplant gurus also installed an array of fresh units.
These include a high-performance piston, an aftermarket oil cooler and new filters, to name a few. Additionally, the single-cylinder machine breathes more freely, thanks to a unique exhaust system with a megaphone-style muffler.
Additionally, the bike’s bodywork was also subjected to a series of surgical interventions. The standard items were removed to make room for an array of custom counterparts, such as a Unosport fuel tank, carbon fiber side panels and a Motodog tail section, as well as a vintage front fender and fairing from Chuck Box.
Lastly, the finishing touches consist of a Motogadget Motoscope Pro gauge, a full LED lighting kit and clip-on handlebars, besides Domino grips and rear-mounted foot pegs. To wrap it all up, Grant Paint Works applied Gulf Racing’s unmistakable livery, which does a sweet job at making this SR400 look the part.
All things considered, I absolutely dig Ohashi’s timeless display of top-grade craftmanship! The build was completed over the course of almost four years, and I’ll be it was totally worth the effort.