Air/Fuel Ratio Meter

KOSO Air/Fuel Ratio Meter

Monitor engine performance precisely with the KOSO Air/Fuel Ratio Meter — a compact, lightweight gauge that delivers critical data at a glance for tuning, diagnostics, and safe operation.

• Multiple readouts: Displays air/fuel ratio (AFR), RPM, and system voltage on one unit.
• Clear backlit display: Large digits and high-contrast backlight ensure quick, accurate readings day or night.
• Playback function: Review peak and recent data to analyze performance trends and make informed adjustments.
• Compact design: Lightweight housing fits a wide range of motorcycles, scooters, ATVs, and custom vehicles without bulky installation.

Engineered by KOSO for reliability and ease of use, this AFR meter helps optimize fuel delivery for better throttle response, fuel economy, and engine safety. Ideal for enthusiasts and professional tuners alike.

Easy to install, easy to read — get precise AFR, RPM, and voltage monitoring in one smart package.