The R100 is the most powerful air-cooled BMW boxer. If you don't want to sacrifice torque during your build, this is the ideal base – complete 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 are excellent for "stripping down" into a clean roadster.
- R100 Monolever (from approx. 1985): easy to customize, many compatible rear-end parts.
- R100 R / late GS (Paralever): technically top-tier, but more complex to build cleanly.
R100 build 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: uncluttered, classic, with rich performance.
R100 Scrambler
With a robust chassis and high-mounted exhaust, even the R100 becomes a rugged scrambler.
Popular R100 custom parts
Café racer rear conversion kit with TÜV certification
Paralever rear frame customizing kit
R100 transmission overhaul (service)
Getting more out of the big boxer
Engine & performance · Carburetor tuning on the dyno · Dual ignition.
TÜV & registration
Our parts are designed for road-legal registration.
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)
If you value maximum torque, yes. Technically and visually very similar, the R100 has more displacement and punch.
Yes – it's a popular conversion. The fairing gives way to a clean, naked look.
As a rule, yes – the deciding factor is the frame type (Twinshock/Monolever/Paralever).
Still unsure? → Customizing a BMW – which model? · Alternatives: R80, GS
Sport Evolution – your BMW custom workshop from Neuwied.
