The vast majority of Powersport vehicles require a 5/8" (16mm) spark plug socket wrench, including Harley-Davidsons, four-stroke dirt bikes, sport bikes, many cruisers, touring bikes, ATVs, and snowmobiles. Some vehicles require a thin-wall socket to fit into the head, negating the use of typical forged mechanics sockets. Socket includes a rubber grommet to hold the plug in place, and meet ANSI tolerances. An 11/16" (17mm) wrench can be used to loosen or tighten the spark plug socket.
5/8" (16mm) hex addresses the most common spark plug sizes
Uses rubber grommet to hold spark plug in socket
Uses standard 11/16" or 17mm wrench to loosen and tighten plug