Replacement Yoke/ Centre Stem Nut. Replace damaged or rusty center stem nuts with a more colourful option. Probolts' most popular size with a M22 x 1.00mm thread and a 30mm socket size. Available in 7 colour options of high tensile Anodised Aluminium. Fits many models of Aprilla, Kawasaki, Suzuki, Triumph and Yamaha motorcycles. Lightweight and corrosion resistant.