One of the best custom Harley builders in Germany Martin Becker of MB Cycles has released a great example of bike design – bike called ‘Bonneville GS.’ Power comes from a mighty 113ci S&S Evo-type motor, which is matched to a Super E carb and pumps out around 100 horses. S&S also supplied the air cleaner, coils and ignition, but the drivetrain comes from Ultima – with a six-speed transmission and a 2-inch belt drive primary.

The rear suspension is an adjustable-height air system from Legend and the wheels are from the Californian specialist DNA. Shod with Dunlops, they measure a hefty 21 inches at the front and 18 at the back. Martin made the perfectly integrated solo seat himself, but stole the fuel tank from a 1960s 125cc German moped – now heavily modified and topped with a pop-up gas cap. Top marks if you recognize the fairing, though: that’s from a 2018 Harley Sport Glide. The ‘bug spoiler’ lower down is from Cult-Werk.
Chiko’s Pinstriping handled the matte paint, which contrasts with the lustrous black powder applied to just about every other part by Metal Skin Works of Reichelsheim. The cockpit area is crammed with top shelf parts, with ABM clip-ons, MB’s own grips, Beringer controls, and a Motogadget Motoscope Pro speedo.

The engine start button and exhaust loudness buttons are neatly set into the top triple tree: there’s no conventional ignition bec...