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03.27.2009, 11:34 AM
I don't think it was too much rpm. Its a bit on the high side for a cheap motor, but cert not more than others have done. Plenty of people have ran 7xls on 4S (about same) and I had a 8XL on 5s for quite a while. More likely bad luck, some user error, or driveline shock or something. Hard to really guess from your post.
I would replace it with a better motor tho, like a Medusa or CC neu or something. They are not that much more $$ and very very much worth it.
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