A 0 weight oil designed to provide the optimal flow rate in Yamaha suspensions on ’98~’04 YZ and WR models, as well as high-performance street models such as R1, R6, FZ1, FZ6, and FJR1300. - See more at: https://www.shopyamaha.com/product/details/01-suspension-oil?b=Search&d=35&dealernumber=#sthash.T1cyjQNp.dpuf