Just a point on your gearing issues, regarding chain fouling, another & better way to avoid this, is to reduce your crankshaft primary gear, which in effect slows down your g'box, allowing you to increase the size of your secoundry g/box sprocket.
This would remove your problem of the chain rubbing on the swing arm, i do use this practice on my bsa mx bikes, it allows you to reduce the gearing considerably, without having to use a rear sprocket, the size of a penny farthing on the back end... dave.
This would remove your problem of the chain rubbing on the swing arm, i do use this practice on my bsa mx bikes, it allows you to reduce the gearing considerably, without having to use a rear sprocket, the size of a penny farthing on the back end... dave.
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