I knew it would take a good beating with a hammer to pound out that bolt, but this one is stuck good. I have a 2000 CR125 and in process of removing the engine to do a full rebuild. I got the other 2 mounting bolts out easy, but not this one. I even used an 8lb sledgehammer and pounded the thing at least 25-30 times. I sprayed penetrating oil on there, I heated it up with a propane torch for about 4-5 minutes and so forth. It won't even budge. I removed the nut, and then you are supposed to pound out the bolt. Sounds simple but not for me. Any suggestions?