For the second time in less than a year, the top end of my 93 650L is cooked. I bought it used so I have no idea what kind of maintenance it had before I purchased it. It started making noise and I found the cam and rockers were worn badly and the center bearing journal was scored. I replaced everything from the head gasket up and also changed out the oil pump, figuring that could be why the top end failed initially. The bike ran great for a few months and then started making noise again. Same story, cam, rockers and center journal. I might be crazy, but I still love this bike. I just can't trust it. Anyone have any words of wisdom, something I'm not doing right? I already ordered up a cam and rockers from Barnums, got the hard welded set. I'm ready to go for one more try. Like I said, crazy.