Supertech 2015 Yamaha YZF250 25x4.46x82.4mm 50 Deg Seat Angle Titanium Exhaust Valve - Single

This Supertech exhaust valve is made from titanium, a strong yet lightweight material that helps reduce valve float at high RPMs. It measures 25x4.46x82.4mm and features a 50-degree seat angle, which is designed to create a more positive seal against the valve seat. This specific valve is intended for the exhaust side of your 2015 Yamaha YZF250's engine.

Using titanium for exhaust valves is a common practice in performance applications because it's significantly lighter than steel. This lower mass means the valve can change direction more quickly, allowing the engine to rev higher and more freely without the valve hanging open. The 50-degree seat angle is a detail that helps ensure a solid seal when the valve is closed, contributing to good compression and preventing exhaust gas leaks.