Norton's Export Twin was designed in 1947 by Bert Hopwood and powered most of the company's motorcycles until the end in 1975. It grew from 500cc to 828cc and features one of the great combustion chamber designs, along with smart cooling and many other features that kept it on the road. Kevin and Mark talk about how the engine came to be and its key design elements that gave it success for so long.

King Kenny Roberts had a lot to say about the Yamaha TZ750: One, "It had too much of everything." And two, "They don't pay me enough to ride that thing." The legendary and fearsome four-cylinder two-stroke democratized racing by being available and affordable to anyone who brought money to a Yamaha dealer--no secret handshakes or "knowing the right people." The TZ750 transformed road racing, dominated Daytona, and had so much power it forced tire and chassis technology to keep up. Join Kevin Cameron and Mark Hoyer as they take a deep dive into one of the greatest racing motorcycles ever made.motorcycle racing, Yamaha TZ750, chassis development, two-stroke engines, racing technology, motorcycle engineering, racing history, motorcycle industry, racing strategies, motorcycle modifications

Carburetor tuning is often referred to as one of the dark arts, but a little study and some methodical work can yield great results. Kevin and Mark explore the intricacies of carburetor tuning while tracing the carburetor's evolution from early days of surface carburetors to spray carburetors, round slides, flat-slides and on to modern electronic fuel injection systems, sharing practical tips for enthusiasts.