IMS 117319N2 Natural Large Fuel Tank - 4.0 Gallon Capacity Fits: Yamaha 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 Perfect for the dunes, off-road racing, on the track, and during those long rides