O.S. 21XZ-R Speed & 21XZ-R VII engines
O.S. have introduced two new 21XZ-R engines for 1/8 scale on-road racing with both featuring superb runtime. Engineered for added horsepower and faster lap times, the 21XZ-R Speed performed well at the 1/8 Scale On-Road Worlds in Miami, Florida with Team drivers coming home in 4th and 5th place with production models. The motor features a redesigned crankcase and carb to produce smoother transitions and higher speeds while the 21M slide-valve carb features 4 adjustable control settings, including a low-end metering needle for improved torque and fuel economy. A more-balanced conrod reduces vibration and wear. Equipped with many of the same performance features as the .21XZ-R Speed ABC, the 21XZ-R VII offers explosive acceleration and top-end for race-winning potential at a more economical price. It combines aggressive timing with easy starting so drivers can unleash its race-winning potential right out of the box, while the cylinder liner boasts 7 scavenger ports and three exhaust ports. Both engines are available in early August.
View the full engine specs here