The Kneeslider

Doers Builders and Positive People

Callaway Cyclone V16 from 4 Yamaha Inline 4s

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If you think the Hayabusa V8 is the epitome of motorcycle engines adapted to automotive use, think again, there's another player in town, the Callaway Cyclone V16. This 80 valve V16 is made from a specially built common crankcase which mounts 4 Yamaha 1000cc inline 4 top ends. If you follow the world of high performance Corvettes, the name Reeves Callaway will be very … [Read more...]

Bad Dog 215 Cubic Inch V-Twin

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Are you one of those guys who feels there's just no substitute for cubic inches? Well, Bill Price thought you might like to know he's designing an engine for you, it's called the Bad Dog 215, as in 215 cubic inches. The sixty-degree air-and-oil-cooled 4-valve DOHC semi-unit 3500cc engine has a 6 inch bore and 4 inch stroke, connecting rods run side by side on a single throw … [Read more...]

Free Piston Engine as Efficient as Fuel Cells

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There's a lot of heavy duty R&D going on these days to reinvent the engine or replace the engines we're using altogether. The free piston engine, though invented in the 1920s, is getting more attention because it is less expensive than fuel cells for generating electricity while potentially just as efficient. The free piston engine has a straight rod that moves back and … [Read more...]

V-Quad Bagger From Nelson Engineering

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Some time ago, I pointed out Greg Nelson's V-Quad engine, a pair of V-Twins joined at the hip to create a V4 with loads of power that still managed to look fairly unobtrusive. He mounted one in an old FXRS and rode around quite a bit, using it as his test bed for development. Since it worked so well, Greg built a bigger version and dropped it into a bagger. As the pictures … [Read more...]

Revetec Engine Developments

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The Revetec engine was first mentioned on The Kneeslider over 3 years ago and there's been considerable progress since that time, the engine has been developed in many more configurations, as shown above, and in testing they've found it to have very high efficiency. Several of these could be adapted for motorcycle use, they have an X4 running in a rear engine … [Read more...]

Adsorbed Natural Gas Conversions for Motorcycles

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Adsorbed Natural Gas (ANG) is a technology that's been around for a while but has been getting more attention for the obvious reason that gasoline prices are forcing us to look at alternatives and I wondered recently which technology would eventually win. ANG conversions for motorcycles are interesting because they can be used to convert 2 stroke engines, as well as 4 strokes, … [Read more...]