Yamaha Motor Co., Ltd. 31M-85981-00-00 Pressure Sensor

The Yamaha 31M-85981-00-00 pressure sensor is a genuine Yamaha OEM component designed to monitor engine and related system pressures on Yamaha motorcycles. It measures system pressure and transmits an electrical signal to the engine control unit (ECU) for proper operation of fuel, oil, and intake pressure regulation, enabling accurate engine management and protection. Compatible with Yamaha motorcycle electrical and engine control systems, it features a sealed industrial-grade sensor housing and a mounting interface that may be threaded or integrated depending on the model, with origins in Japan. Commonly used in touring and performance motorcycles, it is employed for sensor replacement and diagnostics to restore precise pressure feedback for fuel management and overall system efficiency.