• Oct 27, 2009
KickBoxer motorcycle concept - Click above for high-res image gallery

There's a longstanding tradition of using horizontally-opposed boxer engines in motorcycles – and not just from BMW – the flat configuration has found a home in a slew of two-wheelers ranging from Russia's Ural to the current Honda Goldwing. So, it's not too much of a stretch to wonder how Subaru's well-known flat-four engine would work in a bike.

At least one man has decided to find out. According to The Kneeslider, Ian McElroy taught himself Solidworks just so he could create the KickBoxer motorcycle concept, which marries the aforementioned liquid-cooled boxer engine from Subaru to a futuristic motorcycle chassis that features single-sided swingarms front and rear along with hub-center steering.

We're not entirely sold on some of the details, but it sure looks like fun. Even a bone-stock turbocharged WRX powerplant should equal a rather favorable power-to-weight ratio, wouldn't you say? At this point, the KickBoxer exists only on paper and computer files, but McElroy says he'd love to see the machine put into small-scale production. As would we.

Check out our high-res gallery below, and for more images, click here.



[Source: The Kneeslider, Flickr]


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    • 1 Second Ago
  • 25 Comments
      • 5 Years Ago
      An engine of this size would probably have a better application in a cruiser.
      • 5 Years Ago
      Man I wish I could teach myself how to do that in solidworks!
      • 5 Years Ago
      All things with a Subaru flat-four are cool!
      • 5 Years Ago
      who designed this ugly peice of turd?
        • 5 Years Ago
        I agree...Butt fugly...Only cool thing is that it uses a Subie motor.
        • 5 Years Ago
        Excuse me? Bike looks amazing.

        It has that Confederate B91 Wraith look it it. Also, it looks like it has the swing-arm front suspension design like the Bimota Tesi IDs.
        • 5 Years Ago
        This is is a beautifully Designed concept and Mad props to whipping it up in Solidworks, that is no easy task in itself.

        Now I'm not sure i want the inside of my thighs on that engine... pretty sure it would get warm... I wonder if carbon fiber cylinder heads or at least covers would keep it tolerable.

        Build it! this is 100 x cooler than the unoriginal ordered from catalog bolted together and custom painted "cruisers" that so many "custom" bike builders are trying to pass off as custom.

        Autoblog more like this! these are the guys that deserve the coverage and the publicity!

      • 5 Years Ago
      Similar design to Confederate motorcycles. I am on the fence leaning towards no. Kudos for design though.
      • 5 Years Ago
      I dig the whole post industrial futuristic retro combination thing but the engine is a monument of size inefficiency. Compare the engine with say the MV Agusta F4 1078 which pumps out 190hp and you'll see how much wasted material can go into a car engine. Don't get me wrong, as an enthusiast, I get it but, it's really just a very expensive 'look-at-what-I-bought' toy for uber-wealthy Subaru fans.
      • 5 Years Ago
      Well, you don't use expensive professional CAD software just for pretty pictures, so I say there's a chance this will get built.
      • 5 Years Ago
      Yeah... those sideways mounted intercoolers are gonna be really effective.

      The fact that the dude "taught himself Solidworks" in order to "design" this tells me all I need to know.

      I realize that you guys "Obsessively Cover the Auto Industry", but these joe-schmoe renderings of "concept" vehicles are getting ridiculous.
      • 5 Years Ago
      That bike concept if from a customfighters.com member. He also had an amazing cbr1000f custom that looks nothing like the original http://www.customfighters.com/forums/showthread.php?t=9561
      • 5 Years Ago
      Kinda cool looking, but it would offer inferior power-to-weight ratio when compared to some of the supersport bikes available today. Most open liter bikes are already producing 150+ HP at the rear wheel, and you could push that up into the 300+ HP range with a turbo if you're crazy enough.

      Here's an example using a ZX-11 from the 90's:

      http://www.mrturbo.com/turbo-sys/kawasaki/zx11_carb/zx11_carb.html

      • 5 Years Ago
      Fun idea I guess, but not fun to ride. I'd work on dropping the center of gravity, for starters putting the fuel tank under the seat. Seems like its missing a radiator as well, or are the two intercoolers (which are right above the hot cylinders- heat rises) supposed to do the job... I don't know where your knees go either.
      • 5 Years Ago
      Well, it's pretty cool, but I don't see it ever being produced in its current form.

      Anyone know if single-sided hub-center steering has been done before?
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