The O.S. Engine 21XZ-R On-Road ABC w/21M is a powerhouse designed for the serious 1/8 scale on-road racer. With its focus on delivering exceptional performance, this engine is engineered to dominate the track. The strategic use of a tungsten-weighted crankshaft ensures optimal balance, providing consistent torque across low- and mid-speed ranges. This feature makes the 21XZ-R not just another engine, but a finely tuned instrument for racing excellence.
One of the standout features of the 21XZ-R is its meticulously crafted cylinder liner, which includes seven scavenger ports and three exhaust ports. This configuration enhances combustion efficiency, ensuring that every drop of fuel contributes to your racing success. The newly designed crankcase and 21M carburetor work in harmony to deliver a seamless flow of power, while the lightweight piston and durable con rod are built to withstand the rigors of competitive racing.
With a displacement of 0.284 cubic inches (4.65 cc), the 21XZ-R delivers a formidable 3.31 horsepower at 32,000 rpm. Its practical rpm range of 4,000 to 38,000 ensures that you have the flexibility needed for various track conditions. Weighing in at just 13.1 ounces (375 grams), this engine strikes a perfect balance between power and weight, making it a versatile choice for racers seeking to optimize their setup.
The O.S. Engine 21XZ-R is perfect for advanced racers and hobbyists who demand top-tier performance from their engines. Its precision engineering and powerful output make it an ideal choice for those looking to dominate 1/8 scale on-road competitions.
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