Dual Stage Induction: 135/150HP
Honda’s exclusive Dual Stage Induction manages air intake effectively to improve engine performance.
Most four-strokes use long manifolds to deliver air into the cylinder head. The BF135 and BF150 use a shutter valve inside the manifold to change the resonance and air flow.
Honda’s exclusive Lean Burn Control™ system automatically adjusts the air/fuel mix according to speed and load. This helps our motors to deliver best-in-class fuel efficiency in “cruise mode” from 3,000 to 4,500 rpm.
Traditional motor designs use a fixed air-fuel mixture that does ok at low and high speeds, but not in the mid-range.
Honda added an Oxygen Sensor, which monitors the air/fuel ratio and automatically adjusts it as needed.