What started out as computer 3-D design and then turned in to a BMW R905 Bobber Cadbike wasn’t an easy build.
Mark ‘Duckman’ van der Kwaak was born in Australia, since 1972 he has called the Netherlands home. Mark has been designing and building for himself since 1985 and in 2003 started his company DBBP-Design. Mark uses CAD software to design bikes and parts, something he gained experience from in 1994 whilst working in a job where he designed pump parts using 3D CAD software. He took the skills and after hours applied that to his love for bikes.
To begin with Mark used his skills and designed the entire bike in CAD, all the measurement, rake, handling every single detail of the bike build was put together with CAD. The build started with Mark and Aad Heemskerk stripping down all parts. According to Mark “The original plan was just to change the neck of the frame, but when we found the frame was not straight we made a complete new frame using only 4 tapered pieces from the stock frame. It’s now a hardtail and the motor mount position were raised so the motor does not stick out so far on the bottom and it makes the whole profile look lower”.
Mark wanted a 70’s Super-glide tank to be the energy source of this beauty; he got one from his buddy Paul Funk. From there on the tank went though some serious customization.
According to Mark “The wheels are also interesting, I bought a set of black 16-inch rims and designed the wheelhubs myself, long spokes on one side and short spokes on the other. The spokes (80 per wheel) are handmade in stainless steel. The wheels are wrapped in Firestone tires, the front brake is completely built from scratch out of a solid lump of aluminum, and only the brake shoes were used from stock BMW R90S.
A classic H-D Springer front adds the classic look to this bobber. Joe McGlynn of Crime Scene Choppers donated one his beautiful Speedster gas caps for this build. BMW Cadbike #33 Bobber also features a few after market parts, which includes, Crime Scene Choppers Rear light and Crime Scene Choppers/Tiger Leathers Seat.
Three years of hard work Mark and Aad were proud to present this beauty at 2008 AMD European Championships.
Interested in a detailed account of this build? Mark has documented the entire build on his site, its 83 pages long – Impressive!