heat up the head lightly with a propane torch and tap these in place

just install the steel plate bracket off your axle then attach the aluminum license plate bracket

5A 12 volt battery in 6 volt oil tank

which is nice

Chrome Upper Spring Retainers for Harley-Davidson Springers 1932-52 '45's / 53-54 Servicar / 36-48 Big Twin Springers

#8600-8 Hi-Torque Cylinder Base Nut Set Harley-Davidson Big Twin Pre-Evo - Chrome Plated Brand_Pro One Performance Products heat up the head lightlyChrome plated, heat treated, hi torque cylinder base nuts are designed for big bore applications on all pre Evolution Big Twins. These have a hex for a 7 16" wrench. Made in Ohio, USA.