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Message: [QUOTE="guyanimal, post: 1020506, member: 67113"] I am a brand new user. My 15 year-old son finished his very first mx race Sunday. 10 feet before the finish line his bottom end blew, but he did cross the line. We bought his '97 RM125 last summer, so we expect things to go wrong. I am a reasonable tool handling kind of guy but have never opened or worked on the bottoms and am fairly new to 2-strokes. I was hoping to make this a cool dad/son kind of project. We pulled the top end off and found that the lower connecting rod bearing is apparently frozen to the crank pin. Here are my questions: Can we reasonably expect to do some or all of this work ourselves or is it the kind of thing that demands prior experience? Which special tools do we have to buy (crank case separator, etc.?) Is it worth it, in other words, should we just send it to an experienced mechanic? Thank you very much. [/QUOTE]