Kevin will start with atmospheric intake valves and someone from the 1800s, but for real we are talking about Overhead Cams here. Why has OHC become the standard for four-stroke-engine valve operation and what are its advantages. Also, you won't believe how old the technology is. Join Kevin and Mark for the bumpy world of cams above the head.

Early attempts at sealing pistons in cylinders included hemp and other natural fibers. Today's piston rings are made of amazing metallic materials that allow motorcycle engines to last longer than ever. Kevin and Mark dive into piston rings from the early days to now and talk about cylinder finish, ring gap, "flutter," and so much more. Join them on the Cycle World podcast!

In this week's episode, Cycle World Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer talk about racers and crew chiefs and how their seeming supernatural powers relate to their humanity. Also, we have learned so much from these talented, intelligent people and share many stories about some of the greatest road racing riders and tuners of all time, how they win and how they progress. Join us!

Hey, there are more than 2000 bikes, and Kevin and Mark picked so many bikes for the first episode of the 2026 Mecum Las Vegas motorcycle auction that they wanted to keep going! Honda NSR400 to Vincents to one sweet Yamaha TR-2 350cc roadracer, it's another good time with some amazing bikes.

Hybrid power can bring the best of electric and combustion power together, but does it make sense for motorcycles? Benda recently showed a hybrid prototype and Kawasaki has already taken the plunge. Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer discuss hybrid power, including diesel electric trains and a Canadian company doing similar work on semi-trucks and a diesel hybrid pickup truck to retrofit your full-size bike hauler. Hop on and ride with us!

Kevin and Mark pick their favorite bikes from the MASSIVE Mecum Las Vegas Motorcycle Auction. Of course, Kevin picked technically interesting and historically significant bikes, and Mark picked "stuff he liked"! There are great bikes here and plenty of stories to go with them. Harleys, Hondas, a Buell and stuff you may not have heard of. Join us on the ride!

Harley-Davidson debuted the Knucklehead in 1936 and millions of subsequent Big Twins built in its image continue to "potato-potato" down the road! Technical Editor Kevin Cameron and Editor-in-Chief Mark Hoyer talk about the origins of Harley-Davidson's EL and journey through the Panhead, Shovelhead, and up to the modern era. Think of it as the engine that grew with the American highway system! Join us on the ride!

As Technical Editor Kevin Cameron likes to say about aircraft, they have to be light enough to fly and heavy enough to make it to the destination reliably. This drove innovation in design and metallurgy in aircraft that made it all the way to motorcycles, of course! Roller tappets for camshafts? Check! And so much more. Kevin and Editor-in-Chief Mark Hoyer talk about the flow of technology and design from aircraft to motorcycles.

The new Norton debuted a full line of new bikes recently as parent company TVS finally pulled back the curtain after 5 years of work. Cycle World's Kevin Cameron and Mark Hoyer start about 125 years earlier, at the beginning of the company and its reputation for remarkable singles and following racing success. Isle of Man TT! Norton Manx! Up through Commando and the demise of the company in the 1970s. Join us for the ride and then visit cycleworld.com to see the new Nortons on cycleworld.com/eicma landing page.

Kevin and Mark take a look at new motorcycles from EICMA, the huge annual show in Milan, Italy. The guys talk about Chinese motorcycles, the Indian-made Nortons, and, of course, Honda's electric-supercharged V3R and, as always, "more." Visit cycleworld.com/eicma so see all the bikes and read about these interesting new models.