Hello all, I need to vent a little, more out of frustration of feeling helpless.. I have a 03 yz450f that's supermoto trim, just rebuilt the engine 20 hrs ago, new crank, valves, springs, athena 98mm big bore kit, hotcams, ext ext. Took it to a dyno tuner I know nothing about at a local motorcycle dealer. They asked me to drop it off so I was not around when they did the work. Got a call the next day saying it shot the rod through the front of my cases taking just about the whole engine out.. Needless to say I feel helpless about the whole situation and can only take their word on what happened. He say he was mid throttle 3rd gear and it just popped. out of my surprise the guy I talked to made it sound like they are going to rebuild the engine with NEW oem cases ext ext.. This cannot be right.. don't get me wrong I would be absolutely amazed if this actually happens. I am expecting to get another call from the owner telling me tough shit. BUT I never sign anything saying they were not liable for it. I don't know what to expect, I am sitting in limbo. What would you guys do in this situation. Part of me would actually feel bad/guilty if I did end with a new engine. But I was not there to know if it was a mistake on the dyno tuner, lugging the engine on a bad tune or something of the nature.