IMS 117318N2 Natural Large Fuel Tank - 3.4 Gallon Capacity Fits: Yamaha YZ250F 01-02, YZ400F 98-99, YZ426F 00-02, WR250F 01-02, WR400F 98-00, WR426F 01-02 IMS tanks are larger capacity than stock, yet very slim and sleek IMS fuel tanks are designed to enhance the appearance of your motorcycle, yet provide greater riding distance per full tank Made with polyethylene crosslink for extra strength and durability Requires 1998 - 2000 model YZF seat and shrouds