Yamaha - Fuel pressure gauge adapter b - 90890-06946-00Yamaha Fuel Pressure Gauge Adapter B Diagnostic Tool Adapter 90890 06946 00 Overview When you're chasing a fuel issue, guessing doesnt get you faryou need real numbers. Ive used these adapters plenty of times to hook up a gauge and see exactly what the system is doing under load. The Yamaha Fuel Pressure Gauge Adapter B 90890 06946 00 makes that connection clean and reliable without fighting fittings or leaks. Its a small tool, but it saves a lot of