918556 Tappet adj. screw

Keeping the valves adjusted on a vintage Flathead or K-model requires high-quality hardware that can stand up to the heat and vibration of an old-school motor. These MCS tappet adjusting screws are faithful replacements for OEM 18556-40. They fit a massive range of early Harleys, including 1915 to 1973 45-inch, 74-inch, and 80-inch Flathead models, as well as 1952 to 1956 K and KH models. Sold as a set of four, these screws allow for precise valve lash settings, which is essential for maintaining power and preventing engine damage on these classic machines. They are a must-have for any restorer or mechanic keeping these historic bikes on the road.