I actually physically started my project , got the engine off the bike and the engine out the carts frame , axle off and apart , working on the sprocket holder , and found some weld on hubs and sprockets ----------------I measured the shaft at 41mm which is 1.642 , they have a 1 5/8 hub which is 1.625 but don't list a 41mm , so I am thinking I could go 1 5/8 and broach or enlarge the bore a little to fit the shaft before welding it , there sprockets are list as 50 , is 50 the same as 520 which is the listing of the OEM chain ---------42 teeth in the rear and 12 in the front is the bikes sprockets specs , think I should stay the same or increase or decrease it a bit ----------
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