The history of motorcycle engines powering other vehicles goes back a long way. Look at the original Morgan 3 Wheeler, for example. Almost a century ago, J.A.P. bike engines were plunked onto the front of a strange piece of machinery with two wheels in front and one in the back. It proved to be popular and a rather high-performing vehicle in its time. For this Top 10 list we take a look at other applications for motorcycle engines. As you can imagine with a list like this, there are a wide variety of vehicles. Some are production cars, while others are one-offs or boutique items. And yes, even though this is Motorcycle.com, I want to get behind the wheel of every single one of these! So, if you’re a rep from one of the below companies (or are simply a kind soul who owns one), give me a jingle and let’s make it happen!

  • Reid

    The Radical is undoubtedly the best on this list. In fact, I’d go so far as to say that Radical has the most desirable lineup of sports cars for the money. I’d much rather have a Radical than a Porsche, for instance.

    • TroySiahaan

      But would you rather have the Radical or the Atom?

      • Kevin

        But, Troy, what are you going to do with your 510?

        • TroySiahaan

          Maybe I should find a Hayabusa engine for it?

          • Reid

            That would be incredible. Good luck with that project, sir. I would love to own a 510, and the Hayabusa ‘plant would be an excellent choice, assuming it could be adapted to a front-rear application.

          • TroySiahaan

            I don’t have the skill, patience – and most importantly – money to make a Hayabusa engine work in a 510. I’ll stick to day dreaming. :)

      • Reid

        I’d rather have a Radical. Obviously I will never own any of them though :/

        • TroySiahaan

          You and me, both.

  • fastfreddie

    And you couldn’t come up with one motorcycle in that list eh?;)

    • WTF


  • Ajit Menon

    watch this to understand why the ariel atom is just amazing


    • TroySiahaan

      And that wasn’t even the V8!

  • IB

    no the best car with double hayabusa is Wolf GB08 F1 !! 500 HP X 520 kG, carbon chassis Omologate FIA F1, wing car.

  • Prowler21

    Having had quite a bit of seat time in the Scorpion P6… I have to disagree with the snap oversteer statement. The P6 is incredibly balanced and can actually hold a slide. It will only loop when the angle is too much. Everything else that was said about it was on point! It is one hell of a blast to drive!

  • Wally

    Just want to point out that Radical has a race series in the US as well, not just in the UK. Also, their SR8 has a V8 based on two Hayabusa engines. 460hp!
    And I’ve heard tell the Motus RCR is for sale. Talk about a unique track toy!

  • Kurt myers


  • Kurt myers

    How bout a Legends race car with the yamaha FJ/XJR 1200/1250 motor. Looks like cheap fun!

  • Buck Hiltebeitel

    You missed all the airplanes with motorcycle engines! The original Pietenpol had a Model A engine, but soon gained a Henderson engine installation.

  • priap1sm

    There’s a neat single-make race series for the Radical going on. I know the West Coast group is based at SMMR and a group makes it’s way around some tracks in the southwest.

    • TroySiahaan

      Feel free to secure me a test ride. That’d be great.

      • priap1sm

        I actually know a guy that has one out in NOLA, but I haven’t gotten a test ride myself yet.

  • James Stewart

    Add another rear wheel to the Scorpion and you have a Formula SAE autocross car. 600cc sportbike engine and maybe 400lbs. Geared for tight autocross courses but some of them have added Sprint car wings and thrown away the 20mm intake restrictor. They produce illegal adrenaline levels. Sneak into your local university’s Mechanical Engineering Labs – maybe the team will sell you last year’s car…