I decided to take on the task of greasing my linkages, wheel bearings, and swing arm on my 08 wr250f. Everything was going great. I had taken the day off and was just working along by myself. Well, when I was almost finished my neighbor came up and we started chatting. Thats where things went bad. I ended up putting the chain tensioner (the one that is bolted to the frame through the left foot peg) back on w/o first lifting up the chain over it. So when I put the rear wheel back on and got the chain onto the sprocket, the chain tensioner was forcing the chain to rub on the frame. :excuseme: I took the bike for a test ride. I noticed immediately that there was a lot of drag and that something was grinding. (It was the chain against the frame). Anyway, I stopped pretty quick, but there was still some damage to the frame. (sorry, no pics b/c my camera broke) The chain rubbed two gashes into the part of the frame near where the "u" piece of the rear linkage connects to the frame. The gashes are about 1/8" or less deep and about 3/4" long. I was wondering, is the frame right there hollow. I know it didn't go all the way through but it might be close. How thick is the frame? And will this damage cause any major problems in the future, like making the frame weaker. And last can I use something like Quick Aluminum (http://www.ridegear.com/rg/item/F-36626/MSR/Quikaluminum.html) to just patch up these two gashes. Thanks for any help. Tim The first picture here shows the damage from the top. The second is taken from underneath the bike. The third is for reference; I am pointing at where the damage is on the bike. Any input on how serious you think the damage is, or on a review of QuikAluminum would be helpful. Thanks.