Walt Siegl is a skilled designer and custom motorcycle builder originally from Austria, now based in New Hampshire, USA. He is well-known for his exceptional work with high-end Ducati motorcycles, creating unique and beautifully crafted custom bikes that combine classic looks with modern performance.
One of Walt Siegl’s most famous creations is the ‘Leggero’ Ducati, which is made-to-order according to each customer’s specifications. These bikes strike a perfect balance between style and functionality and are easily recognizable due to their distinct design. Walt built four Leggeros with the same template, featuring a chromoly WSM frame, Öhlins suspension, forged OZ Racing wheels, and Brembo brakes. The heart of these machines is a special Ducati motor built by Bruce Meyer, known for his expertise in Ducati engines.
The Leggero’s appearance pays homage to the timeless Ducatis of the late 70s and early 80s. The bodywork is both muscular and graceful, showcasing the craftsmanship of these bikes. Building four motorcycles simultaneously presented challenges, but Walt overcame them, resulting in the remarkable WSM Leggero.
Another impressive series by Walt Siegl is the ‘SBK’ series, which consists of made-to-order Ducati superbikes blending modern performance with classic style. These bikes feature aircraft-grade chromoly frames, custom-built engines, carbon fiber bodywork, and high-performance components, making them exceptional in both looks and performance.
Walt took on a unique challenge when commissioned by Bobby Haas to build a custom bike for the Haas Moto Museum. He decided to use the ‘square case’ bevel Ducati engine, often criticized for its design. Nevertheless, Walt succeeded in creating a track-ready machine out of a 1980 Ducati 900 SuperSport. The bike received numerous upgrades, including a performance-boosting engine tune by Bruce Meyers and a lightweight carbon fiber body, showcasing a vintage feel with modern materials.
Walt’s talents extend beyond Ducati motorcycles. He also customized an MV Agusta Brutale 800, drawing inspiration from vintage endurance racers. The bike, named ‘Bol d’Or,’ features custom-formed Kevlar composite bodywork, an aluminum subframe, and various performance modifications. Walt’s design perfectly captures the endurance racer aesthetic, and the bike performs exceptionally well on the track.
Lastly, Walt collaborated with industrial designer Mike Mayberry to build an alluring custom motorcycle using the drivetrain from an Alta Redshift electric dirt bike. They designed a new chromoly frame, custom swingarm, 17″ wheels, and Öhlins suspension and Brembo brakes. The bodywork was prototyped with cardboard and paper before being crafted from forged carbon fiber and compression molds, resulting in a one-of-a-kind machine with a unique appearance.
