Product: Fuel Valve Gas Switch Petcock for Yamaha RX50, RD60, YZ80, DT80, GT80, DT100 Compatible Models: Yamaha: DT50L (1988) DT50LC (CA ED.) (1988) Enduro - DT50U (1988) Enduro - DT50W (1989) DT50LC (CA ED.) (1990) Enduro - DT50A (1990) Specifications: Nut Inner Diameter: 1/2" (12.8mm) Nut Outer Diameter: 3/4" (19mm) Features: Meets or exceeds OEM quality standards Direct OEM replacement Best value for money Manufactured to OEM specifications, matching the original equipment in appearance Fully factory tested before shipping Non-returnable and without warranty due to the nature of electrical components High-quality ORO replacement part with a satisfaction guarantee Important: Please review images before ordering to ensure compatibility Part No.: 18-639 Cross Reference Numbers: BN431, 17W-24500-00-00, SA7401, YT-FUS0801 Majority of our listings are for a direct replacement for your original part. Our parts are made of quality and are designed to meet or exceed the original OEM Standards. Our products are often a cost effective alternative to genuine OEM Parts. Please note: the models of bike we state in our listings are for general guidance only. Please make sure this item will fit your bike before purchasing. Also, we cannot guarantee fitment to any non-UK models.