Dear Tony.
I had the same problem with my commuter, and like you was having visions of frame failure, it turned out that I had forgotten to true the front wheel. Once that was done the bike was fine. I hope your problem is simple and easy.
Tom Harriman. San Francisco. Ca.
>From: "TONY BOHORQUEZ" <tony_models@earthlink.net>
>To: <classicrendezvous@bikelist.org>
>Subject: [CR]Craking sounds on track bike
>Date: Mon, 20 Nov 2006 13:34:50 -0800
>
>Dear List Members :
>
>I'm asking for your experienced advice in order to trace and
>stop some annoying craking sounds, produce in my vintage track bike,
>during aceleration , when I apply full power .
>I experience some of this sounds in the past with another bikes
>but they were very minor.....
>I 'm using a 3/32 " campagnolo chainring , aluminum handle-bar and
>pedals with the old school toe-clip system.
>Needless to say I already inspect the frame for any fisures or cracks
>and every thing looks ok.
>Any sugestions about how to stop " the screamer...."?
>Thank you all
>
>Tony Bohorquez
>Los Angeles C.A.