Heavy Breathing: A turbo’d Harley Street from Cherry's

Kaichiroh Kurosu is one of Japan's elite builders. He runs Cherry's Company out of a cosy workshop in Tokyo, and his builds display incredible imagination and craftsmanship.Admittedly, we knew little of his virtuoso career until he released the 'Highway Fighter'—an off-the-wall BMW R nineT that currently graces the cover of our 2016 motorcycle wall calendar. And now this machine is one of the stars of the 2017 calendar.

A little digging revealed a portfolio stacked with Harley-Davidsons; Kurosu-san's been wrenching on them for over twenty years.Though he usually works with older Harleys, Kurosu has no problem tearing into a modern machine. You're looking at a Street 750—but it's a radical departure from the controversial original.

Kurosu’s brief came direct from Harley-Davidson, who commissioned five Japanese builders to rework the Street. The bike he’s delivered is chockablock with exquisite details: we've pored over a hundred photos of it, and couldn't find one bad angle.

In typical Cherry's fashion, every part is a hand-made one-off. That includes the elegant girder fork, made up of CNC-machined aluminum mounts, and hand-bent carbon steel trusses.Over fifty percent of the frame is new. Taking cues from the girder front end, there’s a swooping, trellised section that flows flawlessly into the custom-made swingarm. But the astounding visual effect is only part of the story—under the hood are countless welds, mounts and gussets.

Kurosu-san altered the Street's geometry too, giving it a more an aggressive, racy stance. (Bespoke 17-inch wheels with Dunlop racing slicks drive the point home.) The geometry's appropriate, when you realize that this Harley is blown.

That's right—there's a turbocharger, hence the moniker 'XG750Turbo Street Fighter.' The turbo's supported by a custom-made oil cooling system, intercooler and air surge tank. And if that's not impressive enough, cast your eyes over the stainless steel exhaust system.

With all that frame and engine work, it feels like an afterthought to mention the bodywork. But there's otherworldly skill at play here too.The tank cover, tail section and belly pan and are all hand-shaped aluminum pieces. The headlight shroud's custom too, kitted with a halogen light and a modified bubble shield acting as a fly screen.

It all comes off in a snap, thanks to quick-n-easy quarter-turn fasteners. Underneath is an aluminum inner tank, and a rather neat electrical system. There's not a hair out of place here (close inspection will even reveal safety wire in all the right places.)Paint from Nomad Concepts and leatherwork from Skunk add the final touches to Kurosu-san's masterpiece.

It’s far from your typical Harley custom. But really, does it get any better than this?Cherry's Company | Facebook | Instagram | Photos by Hiromitsu Yasui | Thanks to Tadashi Kono for supplying the info.

Build sheetEngine Turbocharger: automotive Intercooler : one-off Air surge tank : one-off Boost controller : mechanical type / run max Oil system for turbo charger : one-off Exhaust & silencer : one-offChassis Frame: stock frame, modified Front fork: one-off girder fork Girder fork spring: one-off Front fork damper: scissor type, one-off Steering damper: v-twin / modified Rear swing arm: one-off Rear suspension: Ducati Monster Lower engine mount: one-off / 12mm steel Lower stabilizer: one-offBrakes & controls Front master cylinder: Nissin Front brake caliper: Harley-Davidson Front brake disc rotor: v-twin / black chromate Rear master cylinder: Harley-Davidson FLT Rear brake caliper: Harley-Davidson Rear brake disc rotor: v-twin / black chromate Handlebar: one-off Clutch lever: Tommaselli Foot controls: Tarozzi / modifiedWheels Front wheel: one-off Front tire: Dunlop racing slick / KR149 120/70-17 Rear wheel : one-off Rear tire: Dunlop racing slick / KR108 195/65-17Body Inner fuel tank: aluminum one-off Fuel tank cover: aluminum one-off Under cowl: aluminum one-off Seat cowl: aluminum one-off Front cowl: aluminum one-off Front cowl screen: bubble shield / modified Oil catch tank: aluminum one-off Headlight: halogen type Rear stop light: v-twin Speedometer: stock Tachometer: v-twin Seat: leather one-off / made by Skunk Paint: urethane / Nomad Concepts