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

O.S. Engine 1AW00 Max-21XR-B ver.II: Reliable Race Engine for Tight Tracks

Designed for pilots who demand consistent performance, the O.S. Engine 1AW00 Max-21XR-B ver.II blends refined engineering with race-focused updates. It is well regarded among racers for offering repeatable power and straightforward setup.

Rugged Design for Demanding Use

The Max-21XR-B ver.II builds on O.S. Engine's reputation for sturdy race hardware. Upgraded airflow paths and better cooling help the engine tolerate longer runs without losing peak power, and the stronger construction reduces service intervals.

Balanced Power and Control

With responsive throttle action and efficient fuel use, the 1AW00 Max-21XR-B ver.II is easy to drive around technical layouts or on faster straights. Its usable RPM range helps drivers place passes with confidence.

Practical Setup Advice

Pair the engine with a matched tuned pipe and fine-tune the high and low needles during controlled test runs. Regular post-session checks and careful break-in will keep the engine performing reliably over time.

For racers wanting a dependable and tunable engine, the O.S. Engine 1AW00 Max-21XR-B ver.II is a sensible, performance-focused option.