50-9870 Anti-rotation bracket tool

Every Harley mechanic knows the frustration of a crankshaft that won't stay put during assembly. This S&S anti-rotation bracket tool is a simple but incredibly effective solution for 1970 to 2006 Big Twin engines, excluding 2006 Dyna models. The tool slides directly over the sprocket shaft splines and bolts securely to the crankcase, locking the crankshaft in place. This is essential when you are installing pistons onto the connecting rods or sliding cylinders over the pistons, as it prevents any accidental rotation that could lead to damage or misalignment. It is a rugged, shop-quality tool that belongs on the bench of anyone performing bottom-end or top-end work on a classic Evolution or early Twin Cam motor.