O.S. Engine OS-1A400 Speed Line 1/10 200mm Racing Engine  [OS-1A400]

O.S. Engine OS-1A400 Overview for Precision Track Use

The O.S. Engine OS-1A400 is engineered for the 1/10th scale 200mm class and continues the development of the Speed series after the Speed 12XZ Spec.III. Focused on better fuel economy and more usable torque, this engine is tuned to perform consistently during race stints.

Long-Stroke Design and Responsive Fueling

The OS-1A400 uses a long-stroke layout to broaden usable power across the rev range. Its refined carburetor improves fuel metering for crisper throttle response and smoother roll-on acceleration. A redesigned low center of gravity cooling head also aids chassis balance and stability when cornering at speed.

Design Highlights and Technical Data

For racers who prioritise consistent lap times and efficient fuel use, the OS-1A400 brings precision engineering and dependable performance to 1/10th 200mm applications.