Barcelona has become a hotbed for custom bikes, largely thanks to builders like Overbold Motor Co., whose CB750 Nighthawk cafe racer we previously featured. Now the crew is back with another stunner: this time a four-cylinder, liquid-cooled BMW K100.
The K100 “Flying Brick” is quickly becoming a new favorite among custom builders. That big hunk of engine offers plenty of grunt, while looking proper-mean, and the bikes offer a wholly different aesthetic from the venerable airhead. This specific build is based on an ’92 BMW K100RS 4 valve — the sportiest in the line. Below, we get the full story direct from Federico Cerdà (aka Fred), the founder of Overbold Motor Co.
BMW K100RS Tracker: Builder Interview
(Answers by Federico Cerdà. Highlights by us.)
• Please tell us a bit about yourself, your history with motorcycles, and your workshop.
Overbold Motor Co. is a special workshop focused on custom motorcycles, located in Barcelona, Spain. Since 2014 we have worked on different motorcycles styles: Cafe Racers, Scramblers, Trackers, Brat Style and some Rat bikes.
Founded by the designer Federico Cerdà (Alias Fred), the workshop is located in the Poble Nou District. One of the last industrial neighborhoods in Barcelona. We work on Japanese and European motorcycles. We love motorcycles and we love the custom side of them. We work a lot on the design aspect before start to build our project. This stage of design works well to define the style of the bike but also serves to agree on the budget with our customers. It is a process that we cannot leave aside.
Our customers know how the bike will look before we start playing it. We make digital sketches to configure everything necessary and analyze with our engineer which modifications will work and which will not. Our team works together to get the best and the most solid results.
On the other hand, we always have a lot of respect when it comes to modifying the bikes, the limitations imposed by ITV in Spain are exaggeratedly ridiculous.
• What’s the make, model, and year of the bike?
BMW K100 RS 4V, 1992
• Why was this bike built?
We built this project for a client.
• What was the design concept and what influenced the build?
The customer wants to give a new life to his old fashion BMW. This K100 is the RS 4v model which has almost 100HP, a very strong engine, but we had to work a lot to restore the rest of the parts of the motorcycle. The customer was interested in having a special custom motorcycle, not a cafe racer pure style. We work on the design style to get a hybrid type of design. Some rad, some mad, the shapes reflect a kind of tracker racer style.
• What custom work was done to the bike?
Speedometer Velona Daytona
Custom side panels
Custom front fender
Custom Subframe hoop
Custom Radiator cover
Supertrapp custom exhaust
Custom Headlight Shield
Custom plate support
Full electric restoration
• How would you classify this bike?
• Was there anything done during this build that you are particularly proud of?
Following our style of design, we always try to give more and go further to get a well-done job. The way that the headlight shield look was a nice hack when we do it.
The simple paintwork and the shape of the seat combine in total harmony. The final result of the motorcycle is very impressive. Look simple but it has a lot of work on it.
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