I have now went through 8 sets of bearings on my clutch bell. I have replaced the spur gear, slipper clutch assembly, clutch bell, shims and the clutch shoes/spring. I am at a total loss right now, no matter what I do the bearings blow. The chassis is straight and I don't strip spur gears at all. The only thing I could possibly think of would be the crank being bent. Is this common? Also is there anything else that could be causing the bearings to blow? I am out of options. I've now spent 90 dollars on the stupid clutch problem and I'm getting to my end. Before I replaced the clutch bell, shoes, slipper, ect. I was blowing bearings in less than 5 min. This was the first time I blew a cb bearing after all the replacement parts. I went through a quarter gallon max.
In this picture the bearing that is still in contact, but is slightly pushed up.