In our June issue, we ran this photo and incorrectly identified this unique brake disc on Stefan Everts Factory Yamaha as a Brembo product. It is actually a prototype Braking product. They are not sure if this design will ever make it to production because it is a very expensive unit to produce. Braking does offer wave rotors for most Motocross and Off-road bikes, which like this prototype, are designed to improve braking power. For more information, visit www.brakinigusa.com.