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1984 BMW K100 – BSK SpeedWorks

Posted on April 9, 2013 by Scott in Café Racer, Racer. 15 comments

If you are anything like me, you’ll always have your latest ‘bike of interest.’ To the uninitiated, that’s the bike that is currently catching your eye. The one that you look at first when you surf eBay or thumb through the local classifieds. And for me right now, the bike is definitely the BMW K100. What it is about the K that really pushes my buttons, I’m not quite sure. Maybe it’s the ludicrous car engine laying on it’s side in the frame. Maybe it’s the shaft drive, or maybe it’s just the jaw-dropping mass of the things. Whatever the case, if I started a new project bike today, a Beemer K100 would be it. And it’s not just me who’s thinking along these lines. Take, for instance, one Ben Kingham of BSK SpeedWorks in Bedfordshire, England. He too has the bug, and I think it’s fair to say that he been bitten worse than I have. A lot worse.

Here’s Ben. “My family has been in the bike business for over 100 years. In the early 1900’s my great grandfather owned a bike shop and sold some of the first motorcycles in the country, just down the road from where we are now based. Currently we specialise in K series BMWs, and are one of the very few places that supply performance/custom parts for this bike.”

“What we know is mostly through racing our BMW K100 in the current BEARS championship and is backed up with over 30 years of building and racing classic bikes. We build replica Ks to almost any spec, for road or track.

Obviously a far cry from the original BMW K100 tourer that this machine was derived from, this ‘café racer’ is built for performance. Weight is kept to a minimum with more than 50kg in excess flab having been removed compared to the standard bike.”

“The engine has been rebuilt with new parts fitted as necessary, including a new clutch and reconditioned oil/water pump, and with our improved air intake and exhaust system and a few choice tweaks, it does go.”

Ben’s mods to the bike are obviously quite extensive. The engine has been mildly tuned, and should be putting out around 90 bhp. Ignition is supplied from a Bosch LE-Jetronic unit. The frame has been chopped, lightened, and strengthened. The rear shock is a RAM jobby, and the fronts are Goldline progressives. Rubber is 3.50 120/17 on the front, and 5.00 160×17 out back. The dash is an ever-popular Acewell unit. And to finish off, both the exhaust and the rear-sets are fashioned by the BSK boys themselves.

Now it may interest some of you, especially those trapped in an unseasonably cold and snowy British Isles, that this exact bike is currently for sale. If you too have been bitten by the K100 bug and feel the need for some tilted four action, feel free to hit up Ben and the boys here.

(Photographs via the talented Matt at Bone Photographic)

  • arnold

    A quote from Wayne’s World: “I’m not worthy!”

  • Guest

    Looks beautiful!

  • I’ve never been a ‘K’ fan, but this has me smitten. Well done.

  • Adam Santella

    Is that a KTM Duke II headlight? love the paint. They made a pretty gnarly looking bike into eye candy here..

  • Richard Brandt

    Prettiest work with a single-sided swingarm I think I’ve ever seen. Great fit and finish all the way through – and the paint!

    Nice work, fellas.

  • New Haven Neil

    Whoa!!! What a transformation! Nice integrated look, makes a great feature of that motor, and tidied up really nicely. I’d do something about the fitting for the plastic radiator shroud that shows on the bottom middle of the tank, but other than that this is well cool. Neat. Great to see another Brit on here too!

  • Anton

    That’s so amazing! I love that you can still see the K100 in it but it looks so much better!

  • jallfree

    didn’t realise you could do such great things with a K100! Wow. Just looked at it on Ebay… If it’s as good as it looks then not a bad price either.

  • I saw this exact bike go past the other day and nearly snapped my neck off looking at it, must be a local lad

  • Wind-blown

    I love obscure builds. This is what a cafe racer would look like in an ’80s sci-fi movie. Great paint job.

  • I really dig K100s. The brick motor really stands out in this build. Cool.

  • itsmefool

    Imagine how many more Munich could’ve sold if they looked like this from the factory! Great job, Ben & Co.!

  • BoxerFanatic

    I want badly to like it, as I am a big fan of BMW bikes, including flying bricks.

    Something about it is just slightly too sparse and piece-meal. The parts are nicely painted, and I like the colors, but the body pieces look like they come from, and really truly belong on three different bikes. Sometimes multi-sourced parts work well together, but I am not sure the seat cowl, stock tank, and front flyscreen/headlight unit work well together.

    The workmanship looks good, and the bike is interesting and obviously a colorful eye-catcher.

    I would have used a modified K100RS fairing, and a K100 shortened sport seat, and kept the radiator cowling.

    I would have gone for something a little closer to what BMW might have done as a K100S, if they had ever built a K100S half faired bike, simpler than a K1, or a K100RS, but sportier than a K100 Perhaps a little less featherweight than this bike, but a little more BMW finishing.

    To each their own, though. I am glad to see any BMW bike getting attention and affection, rather than being discarded.

  • Dennis

    That is really stunning, by far the best K i have seen. I really want one of those as my next bike.
    Well done

  • tony commons

    hi my name is tony does anyone out there have exhaust collector for my 1984 k100rs bmw many thanks