Airflow low speeds
At low speeds,the plenum is divided into two chambers, creating resonance.
Airflow higher rpms
At higher rpms, the valves open, eliminating resonance and increasing air flow.

Dual Stage Induction: 200/225HP

Honda’s exclusive Dual Stage Induction manages air intake effectively to improve engine performance.

While most four-strokes use long manifolds to deliver air into the cylinder head, Honda’s BF225/BF200 use a plenum chamber with twin butterfly valves to vary the volume and velocity of air flow.

Low-Mid RPM Operation:

Mid-High RPM Operation:

The result? A simple, compact design that enhances both low speed drivability and high-speed performance.