If your chain is getting stretched that quickly, it is shot. It will continue to need adjustments after just about every ride unless you replace it and the sprockets. I love the 18 tooth front sprocket on my America, offers a much more relaxed cruising RPM. I can't imagine living with the stock 16 tooth Speedy front sprocket. I ordered everything from Fast Eddy.
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I looked at the chain and 1/2ed it I have 2 very tight spots when marks are at sprockets and loose spots when marks are mid way to sprockets. new chain on its way. Hope this works. I am going to loosen chain in the tight areas so I can ride. That should be ok as long as I dont ride like a banche (right).




Al