Highside/Lowside - A Motorcycle Podcast

Zack and Spurg dive into the auditory soul of motorcycling and what makes an engine sound "iconic." From the rhythmic clatter of a Ducati dry clutch to the "vicious" scream of an Aprilia V4, we break down the sounds that transports us to the racetrack and the open road.
We also pay tribute to the legendary Japanese industrial designer who survived the atomic bomb to create the iconic Kikkoman soy sauce bottle AND the Yamaha VMAX.
Stick around for a special Engine Sound Guessing Game and a heartfelt discussion on the risks and rewards of putting kids on the back of a motorcycle.
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In honor of "Back to the Future" turning 40, industry experts like Ryan Fortnine, Matt Oxley, and Ari Henning take a trip back in time with Zack & Spurg to explore five massive motorcycle "What if" scenarios:
What if Boeing built motorcycles?
What if Harley-Davidson abandoned "heritage" for "cutting-edge"?
How would a different World War II outcome have changed German and Japanese engineering?
What does a truly safe motorcycle look like?
If gas motorcycles were banned tomorrow, would the community survive on electric and hydrogen alone?
Plus, Zack analyzes his actual Alpinestars airbag crash data, comparing his 65-mph highside to Marc Marquez's infamous tumbles.
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Is Marc Márquez the greatest of all time? To kick off the 2026 MotoGP season, Zack and Spurg sit down with legendary racing journalist and historian Mat Oxley to discuss why Márquez is a "generational talent".
They dive into the incredible story of how Marc learned to save front-end slides with his elbows, the countless surgeries it took to keep him on the grid, and how Spain has created the most successful racing culture in the world.
The guys also take a look towards the future at the 2027 MotoGP rule changes that could reset the entire field—and whether Márquez's body will let him stick around to see them.
This entire conversation was inspired by Mat's new book, "Marc the Magnificent: Seven-times MotoGP King". To check out Mat's book for yourself, here is a link to his website.
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The $6,000 Harley-Davidson, Honda's automatic clutch, the "vicious" KTM 990 RC R superbike, and much, much more are discussed as Zack and Spurg preview the most exciting motorcycles, tech, and industry shifts coming in 2026!
We also have an "Am I the A-hole" debate involving a delivery robot and a parked Harley… and we're joined by gear expert Pat McHugh to discuss the future of hearing protection: Cardo's active noise-canceling helmet.
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Can you imagine crashing a superbike at a press event in a foreign country? Zack can! Zack Courts returns to the show and shares his experience (both on and off the track) at the KTM 990 RC R press event in southern Spain.
Spurg & Zack also discuss changes in motorcycle policy at the Circuit of the Americas and whether or not a high BMW price tag is worth it off-road.
Check out more from RevZilla:
Common Tread: News, opinions, and written reviews
RevZillaTV: Bike reviews, How-To's, and product videos