Discover the 2022 Honda BF9.9 – a high‑performance, lightweight motorbike engine designed for enthusiasts who demand power and reliability in one compact package.

Engine Highlights

• New Engine Design: Freshly engineered with modern materials to deliver robust performance.
• Bore & Stroke: 58 mm × 42 mm (2.3″ × 1.7″) for a balanced torque curve.
• Displacement: 222 cc (13.5 cubic inches).

Performance Metrics

• Full Throttle RPM Range: 5,000‑6,000 RPM – ideal for spirited riding and racing applications.
• Rated Power Output: 9.9 HP at 5,500 RPM.
• Cooled by a reliable water cooling system to maintain optimal operating temperatures.

Fuel & Ignition System

• Carburetor: Single carburetion setup for precise fuel delivery.
• Ignition: Advanced PGM‑IG (Programmable Microcomputer Integrated Generator) system ensures consistent spark timing.
• External Fuel Tank & Line: Optional configuration to extend range and simplify maintenance.

Starting Options

• Electric start with a 12 Amp alternator and voltage regulator for quick power‑on capabilities.
• Recoil (manual) starter paired with a lightweight 6 Amp unit, perfect for trail or off‑road use.

Propulsion & Drivetrain

• Gear Ratio: 2.33:1 – delivers smooth acceleration and efficient power transfer.
• Drive Type: F-N-R (Front-Node‑Rear) configuration for balanced handling dynamics.
• Tilt & Trim Range: 5‑stage trim from 4° to 20°, with a maximum tilt of 72°. Power tilt and power thrust options are available for advanced setups.

Aerodynamics & Exhaust

• Through-hub exhaust system reduces backpressure, enhancing engine breathing and overall performance.
• Wet sump lubrication ensures consistent oil delivery across all operating conditions.

Propeller Options (for Marine or Aviation Use)

Standard 4‑blade aluminum propeller – 9¼ in. diameter × 8 in. pitch. Power thrust and power tilt variants are also available for specialized applications.

Safety & Monitoring

• Integrated temperature alert to prevent overheating.
• Rev-limiter protects the engine from over-revving, ensuring longevity.
• No gas‑assisted tilt or oil pressure alerts – simple and reliable operation.

Dimensions & Weight

Total Width: 345 mm (13.6″).
Transom Height Variants:

• S‑Type: 381 mm (15″)
• L‑Type: 508 mm (20″)
• X‑Type: 635 mm (25″)

Dry Weight by Type:

• S‑Type: 42 kg (92 lbs.)
• L‑Type: 44 kg (98 lbs.)
• X‑Type: 48 kg (107 lbs.)

Whether you’re building a racing machine, a trail bike, or an innovative custom project, the 2022 Honda BF9.9 offers unmatched performance and versatility in a compact, lightweight design.