WK21: BMW K100

The Slick Brick’

Pipeburn wrote an article about this bike. Click here to read it!

The BMW K100 is currently gaining popularity in the custom world and with the BMW quality as a basis; it is a nice bike to work on!

Roland, the current owner of this BMW K100, is a guy that lives in Utrecht and he already had good connections with a neighboring motor shop (RB Motoren in De Bilt). He came to Wrench Kings requesting to build a bike purchased and serviced by RB Motoren; a perfect deal! RB Motoren is a BMW expert and for Wrench Kings this meant that the bike would be in impeccable condition, at least mechanically.

This cooperation between two companies resulted in a stunning bike, built in less than three months, with all minor and major maintenance taken care off.

The challenges on this bike were the lines and the electronics. The K-series is known as the flying brick due to the big engine and the overall looks.  The K100 has a big, flat-mounted, in line, four cylinder injection engine.

To give this bike its classic look, the choice was made for a piano black paint job with custom golden striping on the tank and the seat. A serious paint job with a stunning end result! To make the golden striping stand out, the rest of the bike is black as well, with vintage brown leather seat upholstery by Toni’s Custom Works.

BMW and especially the K-series, has nonstandard electronics. The moment you remove the original instrument cluster, you need a relay for the gear indication, the original speed signal is on a 6 Volt basis, the blinkers have their own complicated relay that isn’t one-on-one compatible with modern led lights, in other words: a nice puzzle!

Modifications & parts

  • The gas tank is from a BMW K100 LT (a cleaner look)

  • The front fender is from a different K100 model

  • Clip-ons

  • Biltwell grips

  • Refurbished controls

  • The subframe is adjusted in such that the polyester seat pan is fully supported by a custom metal frame

  • Leather seat upholstery by Toni (www.toniworks.nl)

  • A big 7” Reno style headlight

  • A subtly built-in tail light

  • Led indicators at the front and at the back

  • A fully functioning Acewell speedometer

  • Dunlop street smart tires

  • Powdercoated frame, powdercoated rims, powdercoated parts, powdercoated everything

  • A custom license plate bracket

  • A stainless steel collector with a stainless steel Spark GP muffler


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