Bel-Ray High Performance Fork Oil is formulated for use in all suspension forks including those using cartridge and dual-chamber systems. Through the use of carefully selected high viscosity base oils, stiction and fade are reduced providing smooth operation over a wide temperature range. Bel-Ray High Performance Fork Oil is available in seven viscosity grades; 2.5W, 5W, 7W, 10W, 15W, 20W and 30W. Recommended for all standard and cartridge type motorcycle fork suspensions on street and off-road motorcycles, ATVs and all other high performance applications. Direct replacement of original O.E.M. fill. Follow the fork manufacturer's recommendation for grade selection. For fine tuning damping characteristics all grades of Bel-Ray High Performance Fork Oil may be blended with each other.