RD/RZ Steering Damper Fork Tube Clamp. Billet fork tube clamp. Includes 2 stainless M6x1.0 clamp bolts and one M8x1.25 damper mount bolt. Available in fork tube sizes for many front ends: 34,35,36,38,39,41,43,45,50,52,54mm sizes. Note (RD250/350/400 is 34mm/RD400F Daytona is 35mm, RZ350 is 35mm). Choose clamp size and click add to cart.