Koso Mini 3 Meter A/F Ratio Dc12v W/O 02 Sensor

The meter is designed for using it on the 2 stroke race bike or the snowmobile for the customer to adjust the carburetor or the injection system. 
The BOSCH wide band sensor is the best wide band sensor used on all the race track and testing laboratory. 
The air/fuel ratio meter could show you the real time information at the shortest time. 
Except that, you could also make the setting to warn you when the air/fuel ratio is too lean or too rich.

Applicable for :
25102-ALL57-M3AFH - Honda
25102-ALL57-M3AFY - Yamaha