My fe 400 has developed quite a loud knocking, it started quite suddenly so I stopped riding it and I'm using my other bike for now. I've recently stripped the casings as I had a problem with the camshaft beairings collapsing, it rode fine for a few weeks after that, now it's started knocking quite loudly. Is this likely to be big end bearings? I'm going to strip it before the weekend hopefully, I'd like to just get the parts ordered beforehand if I can. Getting pissed off with this bike breaking all the time it gets new oil and filter every 10 hours and I don't ride it hard at all and keep the revs nice and low. Very tempted to get rid of it after I rebuild it