Converting BMW K100 & K75 into Café Racers from the Flying Brick
The "Flying Brick" is the insider tip among custom bases: affordable, four-cylinder performance (K75: three-cylinder), smooth running, and with an unmistakable, industrial look. The K-conversion scene is growing – but it is not yet overcrowded.
Long dismissed as "uncool," the K-models (K75, K100, K1100) are now one of the smartest choices for a unique custom build with performance and a small budget.
Why the K-model is a smart conversion base
- More performance: smoother running four- or three-cylinder instead of a two-cylinder boxer.
- Affordable base: very attractive entry-level prices for good vehicles.
- Unique look: the industrial "Flying Brick" character sets you apart from the boxer mainstream.
⚠️ Important: The K-series has a longitudinally mounted engine and a different design than the boxer. K-conversion parts are therefore not identical to boxer parts – make sure to use the appropriate K-components.
K-model conversion styles
K100 Café Racer
The classic: clean tail, clip-on handlebars, sporty lines – the four-cylinder makes it powerful.
K100 Streetfighter / Scrambler
Raw, uncompromising look or off-road-capable custom – the K-base handles both.
K-model conversion parts
You can find all conversion parts, chassis, and engine parts for K75, K100, and K1100 gathered in our K-collection:
Other areas: K-model chassis tuning & service · K-models exhaust & engine.
Frequently asked questions about the K-model (FAQ)
Still unsure? → Converting a BMW – which model? · Boxer alternative: R80
Sport Evolution – your BMW custom workshop from Neuwied.
