RD Kustom SR1: Ultra lightweight streetfighter with a Buell engine

RD Kustom SR1: Ultra lightweight streetfighter with a Buell engine 1




Built by Jimmy Messina, the bike won the Best of Show award in the AMD European Customizing Championship.

The RD Kustom SR1 is not a customized production bike, but a project built from scratch. The SR1 was built around a Buell S1 Lightning 12,000cc V-twin. The undercarriage was first modeled and calculated in Solidworks, then it was embodied in metal.

RD Kustom SR1: Ultra lightweight streetfighter with a Buell engine 3

The spine frame is made from two aluminum tubes that connect the steering column and the rear suspension swingarm mount. The engine is included in the power structure of the frame as a loaded element.

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RD Kustom SR1: Ultra lightweight streetfighter with a Buell engine 7

The Ducati 1198 fork is mounted in custom traverses milled from aluminum and painted in matte black. At the rear is an aluminum cantilever swingarm connected to a horizontally mounted EMC mono shock absorber working in tension. The wheels are the lightest Marchesini available and the braking components are also from the Ducati 1198.

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RD Kustom SR1: Ultra lightweight streetfighter with a Buell engine 11

Jimmy Messina, the creator of this bike, didn’t limit himself to creating a lightweight chassis, but he “cheered up” the engine a bit. Buell’s 1200cc V-twin got two Keihin FCR carburetors with 39mm diffusers, low resistance filters, and a custom exhaust system with an SC-Project muffler.

The SR1’s appearance is extremely minimalistic: a short “tail” with a single seat, a compact diamond-shaped headlight, and a tiny front fender. Everything, no frills! After winning the European Customizing Championship RD Kustom SR1 received an invitation to the final of the World Customizing Championship in 2023.