This engages the splines on the primary (left) side of the crankshaft and can be turned using a 3/4 inch wrench on the hex

30 degree rake neck 2" up from stock location

This has to be one of the cleanest license plate mounting solutions we have seen for a Sportster

This brilliantly simple guide is the solution

Lecter LED Tail Light - Shot Blasted Aluminum All Products Collection This engages the splines onThis tidy, cast aluminum tail light has a 2" diameter lens and works as a running and brake light, as well as having license plate illumination via a slot on the underside of the tail light. The rear mounting studs are on 30mm centers (1. 18") and the widest point of the light housing is 3". As far as the wiring, yellow is for running light, red for stop light, and black for ground.