I had 130 miles on a new top end. Figured it was broke in. So I went off to ride some tight single track today. Then we decided to cut a new trail threw the brush, trees, rocks etc.... and my bike started to over heat a little. My question is. That shouldn't hurt the new top in ??? I let it cool down 20-30 Min's. Then was fine. We added 1/4 + mile of new trail. Went over it a couple of times. It would of been easier with some hedge clipers.