Back in the day, Kawasaki’s almighty MY1973 Z1 (also known as Z900 Super Four) was a true superstar among two-wheeled beasts of all shapes and sizes. Within its tubular steel double-cradle frame, this bad boy houses a feral DOHC inline-four powerplant boasting two valves per cylinder and a healthy displacement of 903cc.

In stock form, Kawasaki's monstrous piece of air-cooled machinery is more than happy to produce as much as 82 hp at 8,500 rpm and a crushing torque output of up to 54 pound-feet (73 Nm) at approximately 7,000 rpm. The engine’s unforgiving oomph is channeled to a chain final drive by means of a five-speed transmission, enabling the beast to run the quarter-mile in as little as 12.3 seconds.

Additionally, the top speed is generously rated at no less than 135 mph (217 kph). Given its juicy characteristics, we’ll bet Japan’s Yoshiwara Factory had one hell of a time customizing this timeless showstopper. After all, this is no ordinary bespoke affair.

Bearing the name "Skeleton Tank," this otherworldly masterpiece features an array of transparent bodywork items that’ll leave you genuinely speechless. These modules have been painstakingly fabricated using a blend of see-through fiber weave and clear resin, leading to some spectacular results.

Most notably, you will find a flawless gas tank doubling up as a fuel gauge, accompanied by a retro-style front fairing, custom fenders, and a one-off tail section keeping things looking seriously rad. To wrap it all up, the Z1 received a green-tinted color scheme and an assortment of black decals.

Furthermore, the project’s mastermind went about installing several aftermarket components to enhance this machine’s aesthetic and have it perform like an absolute wonder on the tarmac. These include repurposed Koni shock absorbers, new turn signals, and seven-spoke hoops enveloped in a delightful golden finish, to name a few.

The finishing touches come in the form of a flawless four-into-one exhaust system manufactured in-house, as well as a fresh set of carbs to help the engine breathe with ease.

Credit: autoevolution

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