Customizing the BMW R100: The big boxer as a custom bike
The R100 is the most powerful air-cooled BMW boxer. If you don't want to sacrifice torque for your build, this is the ideal base – with the right TÜV-certified parts.
The R100 is the big sister of the R80: the same good-natured boxer technology, but with nearly a liter of displacement and noticeably more punch. For anyone who wants a build with character and performance.
Why the R100 is a first-class base for a build
- Most power in the Airhead family: the 980 cc boxer delivers the strongest torque of all air-cooled BMW two-cylinder engines.
- Same parts ecosystem as the R80: practically all 2-valve custom parts also fit the R100.
- Iconic look & robust technology.
Which R100 do you have? Variants & frames
- R100 / S / RS / RT (Twinshock, up to approx. 1984): the best base for a purist café racer. Faired RS/RT models can be excellently "stripped" into clean roadsters.
- R100 Monolever (from approx. 1985): easy to customize, many matching rear-end parts available.
- R100 R / late GS (Paralever): technically top-tier, but more complex to build cleanly.
R100 custom styles
R100 Café Racer
More displacement, more of a statement. A classic: building a naked café racer out of a faired R100 RS.
R100 Roadster
The confident everyday custom: tidy, classic, with rich performance.
R100 Scrambler
With a robust chassis and a high-mounted exhaust, even the R100 becomes a rugged scrambler.
Popular R100 custom parts
Getting more out of the big boxer
Engine & performance · Carburetor tuning on the dyno · Dual ignition.
TÜV & registration
Our parts are designed for road legality.
Build it yourself or have it built?
The R100 is just as rewarding as the R80. Prefer a finished result?
Frequently asked questions about the R100 (FAQ)
Still unsure? → Customizing a BMW – which model? · Alternatives: R80, GS
Sport Evolution – your BMW custom workshop from Neuwied.
