A 180 horsepower supercharged American sportbike, the Roehr 1250sc!

Archive for 'Engines' Category


Next Page »

Looking Inside the Combustion Chamber

8 April 2008

BMW wanted to make a video showing the inside of an engine cylinder during one revolution, including the actual ignition and combustion. 3 engines, a bit of sawing and drilling plus some high speed cameras and this is what you get. No special effects other than a very high frame rate to slow everything down. […]

Ricardo 2/4Sight - 2 and 4 Stroke Engine

26 March 2008

We’ve seen engines that turn cylinders on and off but how about engines that switch between 2 and 4 stroke operation on the fly? The engineering firm, Ricardo, has developed a prototype of an engine that does exactly that, they call it the 2/4Sight. With careful design of intake and exhaust ports plus a control […]

Kinematic Models - Mechanisms in Motion

22 February 2008

Most of you are probably interested in all things mechanical, not just motorcycles, the term gearhead is a badge of honor around here. With that in mind, you might want to check out the kinematic models website at Cornell University. The site has a lot of photos and diagrams of every sort of mechanical movement […]

Morbidelli V12 in the Works

12 December 2007

Giancarlo Morbidelli, who, you might remember, put a beautiful little V8 engine in a motorcycle, has been working on a very nice little V12. Evidently, this is a project that’s been underway for several years but I was flipping through the November issue of Classic Bike and they have a really nice article with loads […]

The Kneeslider – the Motorcycle Magazine Rack

29 November 2007

My Internet connection from the friendly folks at Verizon decided to go offline this morning, (along with the connection of many thousands of others) so I thought I would use the time to catch up on the motorcycle magazines I’ve been piling up instead of reading. Found a few interesting items …
Greggs Customs / GC-Cycles, […]

Harley Davidson Dynamic Exhaust System Patent

21 November 2007

Harley Davidson is developing a dynamic exhaust system design that redirects exhaust gases depending on engine RPM and throttle opening. The exhaust system has 2 paths for the exhaust with a cable operated valve directed by a control unit sensing engine speed and throttle opening.
The valve operates to control the torque curve of the […]

JRL Cycles Radial Engine Motorcycle Video

19 November 2007

We’ve seen the photos of the radial engine motorcycles with those gorgeous 7 cylinder Rotec radials, but how many of you have heard the engine run? Here’s a short video of the engine at high idle with a few throttle blips thrown in. It sounds good and really smooth. I like it!
Video below:

S&S X-Wedge Custom for Jay Leno

16 November 2007

The S&S boys teamed up with the ExxonMobil Mobil 1 crew to build an X-Wedge custom bike for Jay Leno. It’s powered by a 117 inch X-Wedge and is more of a sporty cruiser than any sort of chopper, after all, Jay Leno is a bit more performance oriented. This motorcycle is the first to […]


Next Page »