My boyfriend was attempting to put some sort of metal shield on the bottom of his crank case, and he was wrenching way too agressively, and suddently the crankcase cover started leaking oil, and so he drained the engine, and then took a peek, and sure enough, there is a small crack near a seal. Is there any way to repair this either by using epoxy, or sodering, or welding? He is devastated ,and so am I, because my riding partner's bike is out of commission. You can e-mail me at Einrad@aol.com with advice. Thank you!