Front Fork High Performance Suspension Fluid (1 ltr) 5w Part # 110-017-001   K-tech fork oils is recommended to be used in all of their replacement cartridge kits to get the best out of their kits. The use of another 5wt oil may reduce the performance of the kits. K-tech fork oil has been developed with years of testing by some of the world’s fastest riders and is designed to keep up with the demands of today’s motorcorss and enduro riders. Unlike many other fork oils, K-tech's oil is an exact 5wt.