I have a 1928 Norton CS1, can someone enlighten me on what type of bearings Norton used for their drive side/timing side bearings? also what type did they use on the camshaft bearings top and bottom? Presently fitted are Skefko RL8 self aligning bearing on the mains, are these original fitment? I have done some research and the Skefko bearing seem to be a good make but made in China. Would a Timken bearing be better??