Installing lock-out hubs was without a doubt, the best modification done to my M37. Second would be.... replacing the antiquated points, with an electronic ignition.
Another way to go is use the a non driving hub in place of the driving type. They were called a mcleary hub or some thing like that. Instead of splines the have a bearing in them. I've got a set still in cosmoline from 1955,some day I'll hopefully get them cleaned up and try them. I got them off ebay for less than 50.00.
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