O.S. Engine 1AW00 Max-21XR-B ver.II Performance Engine  [OS-1AW00]

O.S. Engine 1AW00 Max-21XR-B ver.II: Consistent Power for Competitive Runs

Engineered for enthusiasts who value predictable lap performance, the O.S. Engine 1AW00 Max-21XR-B ver.II combines well-engineered internals with race-focused enhancements. It is favoured for its steady output and manageable tuning characteristics.

Performance-Focused Engineering

The Max-21XR-B ver.II enhances airflow and cooling to maintain peak output during prolonged running. The attention to material quality and assembly gives racers confidence in the engine's service life under competition loads.

Driveable Powerband

Delivering a practical blend of efficiency and throttle response, the 1AW00 Max-21XR-B ver.II suits a range of track types. Drivers will appreciate its usable midrange and the ability to extract top-end speed with careful pipe and carb setup.

Tuning Guidance for Racers

Best results come from pairing the engine with a matched tuned pipe and making incremental needle adjustments during controlled test laps. Regular inspection and routine maintenance keep performance predictable across events.

The O.S. Engine 1AW00 Max-21XR-B ver.II is a solid choice for racers seeking a tunable, reliable engine for competitive club and event racing.