New, un-used Yamaha YZ250 Boyesen rad valve. Bought and bolted to bike but realised it won’t work with my set up. I use a custom 50mm piston shock absorber, which uses a larger diameter spring, it is very close to my air boot as stock. With the rad valve this made the airboot touch my spring. Everything is there as brand new, in the box, I just can’t use it unless I swap shocks, which I don’t want to do. Delivery to mainland UK only, collection from near Battle, East Sussex.