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Okay, probably not your typical post here. We race Mini-Sprints and have a 2002 Yamaha r6 in our car. We just took this motor out of a wrecked bike. The only thing wrong with it was a crack in the timing cover. We replaced the gasket and cover and bolted it in. We changed the oil and plugs. The bike had under 5,000 miles on it.

The motor fired fine, but has this wicked hum/whine to it. Please view the short video clip below to hear the noise.

What is it? How do I fix it? The motor sounds good other than the hum, revs fine, and shifts thru all the gears okay. Don't have a clue. Our 99 R6 didn't have this type of hum.

Here is the clip! Thanks so much for your help in advance!

http://blip.tv/file/1090101
 
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