As delivered from the factory. The lower seal has no retainer.
My print and business card prototype. Instead of pinning the gear end of the retainer I will use leverage against the rib it is anchored on for hold down pressure.
Bent and fit into place. Time to check clearance, modify as needed, and drill the hole.
Overall the project went pretty smooth. Thanks go out to the people who figured this out and shared what they learned. I'm one step closer to having another Interceptor on the road!
The Interceptor cylinders bored and ready to go. E & V Engineering in Howard City Michigan did the work. They are regional British bike experts and offer many services and parts for British motorcycles. Check out their site and custom part offerings including many for BSA singles. http://www.shopevengineering.com/index.htm