VALVE SHIM TOOL（FOR HONDA） Designed to adjust valve clearance on Honda twin-cam models. It can hold the valve spring bucket down while removing the adjusting shims. It fits CB750 (ALL) 79-82, CB750SC 83, CB900C/F 80-82, CB1000C 83, CB1100F 83, CBX 79-82 Material: CrMo steel