lambda probe EFI euro4 rongmao sco China 4-stroke

This lambda sensor (O2 sensor) can be used on the Chinese EFI Euro4 scooters that are equipped with the Rongmao ECU. These scooters are identified by a Rongmao ECU, Rongmao injection system and Rongmao throttle body. The lambda sensor has a 4-pin connection. The advice is to use copper grease around the threads of the lambda probe. This prevents the lambda sensor from getting stuck in the exhaust curve. If the lambda sensor gets stuck, the lambda sensor may break and malfunction as a result.