Wiseco Exhaust Valve Titanium YZ450F `14-19 + WR450F `16-20

Wiseco Exhaust Titanium valve made with a special surface treatment to increase performances and duration. It is recommended NOT to touch them with hands, gloves or to lubricate them with oil as an oxidation process may be triggered resulting in decreased duration and performance. Do not use grinding componets or liquids, during rebuild valve seats should be machined to allow a perfect contact between valve and its seat.