The part in question in this example is the steering stop. The Spartan Engineering yokes are designed for trials use, and as such are not supplied with any steering stops, or for that matter anywhere to mount any. It is a must have feature, as any work carried out mounting the tank can only be done safe in the knowledge that the forks will not, cannot suddenly swing onto full lock and clout the tank. I didn't want to drill the yokes so whatever was there had to be utilised.
The steering stem is held into the bottom yoke with an M12 bolt, which is obviously concentric with the arc of the turn of the forks, so that is a good fixing point for a plate to be attached. The next hurdle was sorting out a sturdy way of stopping the plate rotating around the single bolt, luckily Spartan bore two 16mm diameter holes in the underside of the yoke for lightness, ideal for two pegs to locate. As a bonus it was also possible to utilise the same bracket to mount the head light, again saving the need to drill, and a bracket that serves more than one function is always good.