This week Kevin and Mark are getting MORE MOLECULAR than usual! We know, it's awesome, right? The motorcycle mostly started with iron, then steel and some bronze, and then we got aluminum, titanium, beryllium and more, plus all kinds of composites. Despite getting molecular, it's a big topic, so join us on our epic journey.

Yamaha is a passionate racing company but recent success has eluded the tuning fork folks. Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer dig into Yamaha's new V4 MotoGP racer that debuted at Misano and is under continued testing. Will the V4 solve all the company's problems? Will rides love the new engine and bike? What are the advantages and disadvantages of V4s and inline-4s. Listen to find out!

Kevin and Mark dive into what's holding back the ULTIMATE PERFORMANCE of your motorcycle. What could be changed in the engine or with aerodynamics that could help us hit 250 mph? What are the tragic shortcomings and amazing strengths of motorcycles today? Jump in the slipstream and take the ride with us on the Cycle World Podcast.

Engine vibration...does it eat horsepower? How do we control it? Where does it come from? What's secondary vibration vs. primary? Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer discuss the many types of vibration in engines and the various schemes used to control it or let those vibes we love come through.

The little step-through that changed transportation around the globe and helped Honda achieve Grand Prix Racing success, technical dominance, and massive wins in automobiles, the 1958 Super Cub hit a target for buyers no one had yet considered. Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer discuss how Soichiro Honda and Takeo Fujisawa helped conceive of this little motorcycle to function easily in broad conditions and the unique features that helped it fly off the showroom floor from the very beginning.

All we've ever wanted is complete control of combustion in our motorcycle engines and we are closer than ever. Find out how cleaning up emissions has enhanced power, running quality, engine life and more as Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer discuss the combustion process and all the tricks used to move ever closer to stoichiometric. What's that? Listen and find out. Also, there's a chance someone might say "Velocette" or "TZ750," so don't miss it!

Barn finds, garage finds, yard finds and alley finds, that abandoned old motorcycle isn't going to start itself! Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer run through the steps and tricks to get an old carbureted or fuel-injected motorcycle running. Two-stroke oil in a four-stroke? Yes! De-rust a gas tank--we have a way! Listen as discuss the smell of old gas and getting a motorcycle out of the barn and back on the road.

Concept bikes can be crazy weird looks at a possible future or be hints about new models to come. Some are even intended as near-production but never make it. Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer run down a list of 10 concept bikes that might have been and one that actually made it to the streets of America. Hybrids, superchargers, inline-sixes, alternative front suspensions, and one called "Biplane"?! And if it has four wheels but leans, is it still a "motorcycle"?

If every combustion event in your motorcycle engine was the best it could be, power and efficiency could rise by as much as 20 percent! Find out how engineers and designers work toward this optimal goal and how chaos just keeps getting in the way. Technical Editor Kevin Cameron and Mark Hoyer talk about all the things that influence how the charge lights off in the cylinder of your motorcycle engine.

Leave it to Technical Editor Kevin Cameron to start in 1862 with the first guy who conceived the four-stroke combustion cycle. KC proceeds with Editor-in-Chief Mark Hoyer on the journey to the combustion chamber we have today and why it's shaped how it is, flatheads to hemis, two valve, four valves and more valves! There's so much to cover in such a small space. Join us!