The rear stand may be one cause of the breakage but not in my case. My bike is a D. I had the same break at the mount to the front of the RFM. At about 45 mph, it decided to let go and the mudguard dropped down, hit the tire and locked 'er up. I managed to guide the bike to the side of the road without dropping it, crossed up like a flat-tracker. I had to remove the guard just to roll the bike completely off the road. Fortunately, two guys behind me in a truck stopped to help. They were bikers and very impressed with the Vincent. We put the loose parts in their truck and they followed me home.
The guards are stainless. The rear guard had several cracks around the mounting hole and the stays were bent. I welded up the guard with stainless wire in the MIG, ground the welds flat but leaving extra thickness in that area and put things back together. So far, so good. Oh, and Loctite on the bolts.
I was lucky (skilled?) that time. I'll be giving this area special attention from now on.
The guards are stainless. The rear guard had several cracks around the mounting hole and the stays were bent. I welded up the guard with stainless wire in the MIG, ground the welds flat but leaving extra thickness in that area and put things back together. So far, so good. Oh, and Loctite on the bolts.
I was lucky (skilled?) that time. I'll be giving this area special attention from now on.