Detail Motorcycle Fork Stem Base with 1 Balls Cleanest way to mount small electronics on your motorcycle Slide the assembly into the hole of the stem and tighten the machine screw to create a tight fit Designed to fit into the cylindrical bore wall of fork stems and will work with stems that measure from .5 1.10 Powder-coated marine-grade aluminum Certain motorcycles require adding electrical tape to the area of the plug that has the largest diameter until it fits snugly in the stem