Uma Racing has produced these lightweight Stelite coated stainless steel valves for racing applications. Lighten your valve train and increase maximum engine rotation speeds. This high performance products are designed from a single piece of forged stainless steel alloy. Stellite is a hard coating applied to valve stem tips and faces to provide a hard surface with high wear resistance. Sold in a pair of 28mm intake and 23mm exhaust valves for the Yamaha Crypton/Jupiter/Vega T110 and T115, also works with the Yamaha TTR-110.