Me and some of my friends went riding to day and heres what happened to one of them. He was trying to climb a hill and his bike went flying through the air.
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That exhaust was only a little over 1 year old.

Dam

Thats what happened to my friends YZ450, pretty common i guess, it was funny as hell to watch haha, his underwear was like stuck in the skin of his butt!!! lol he was alright