well...it isn't the crank
update!
this happened sunday and I just got the engine back together and timed it up tonight, bout another half hour and it will be ready to install. He was running third gear when it dropped. I am leaning toward swampdales theory. it is a very clean break at the bottom of the stem. The stem slid right out of the head and was not bent. The last harescramble we were at he got hung up and held it off the revlimiter while rocking it back and forth, that i know did not help the matter. We have the district 15 state championship harescramble in tow weeks, i hope to have the eninge done tomarrow so he can check it out this weekend. thanks for the feed back, also so measured the rod side clearence on the crank it was at .018" both of my cannondale cracks were at.015, my winky crank was at .007" should he be worried about this? it turns free and smooth,
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