Old 09-04-12, 06:35 AM
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Location: Alexandria, VA
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Bikes: '78 Motobecane Grand Jubile, '79 Peugeot PXN10LE, '88 Fuji Saratoga, '12 Jamis Sputnik, '13 Motobecane Fantom29 HT, '16 Motobecane Turino Pro Disc, '16 Motobecane Gran Premio Elite

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Originally Posted by gmt13 View Post
I'm gonna guess that it's the freewheel. Some of them have enough play to knock a bit. It is always intermittent. Next time it happens, try spinning the cranks backward one revolution - see it it stops.

This is a common problem on the SS BMX type freewheels.

^^^ With high certainty, I'd say that this is your issue. You may be able to quiet the freewheel by removing it, soaking it in a mild solvent (like mineral spirits), spraying in a solvent with force (like wd-40) into it and spinning it, then re-lubricating with a synthetic motor oil. Pour it in the outer rotating seam, and let it drain outward. Wipe clean thoroughly and re-mount on your wheel. Let stand overnight with a cloth beneath the freewheel (keeping remnants of oil from dripping onto your rim), wipe again and you should be good to go.

By the way, sounds like you has a Uniglide Shimano cassette. You need to chain whips to remove them - instructions are on the web. These cassettes can be found on eBay for relatively cheap, so you could re-use the original wheel if you wanted... PG
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