Cannondaleriders

Did I find the next possible weakness in our engines?? My engine has finally failed with ATLEAST 300 hrs. Here seems to be the culprit. This bearing just fell apart when i pulled my crank. This is the flywheel side crank bearing. "the one pressed into the case"

ten char....

Wow that got hot!

ten char.....

....just send the loose pieces to Wistech!!

was looking at the last pic but i did not see. a oil ?? hole that feeds the bearing hard to say from pic

I personally feel that this is NOT a weak link on our motors. If you consider this bike does have 300hours, it should have been torn down at least 150 hours ago for a routine rebuild (rings, bearings, etc.) I have tried the ball bearings, with not much luck. The longest I have gotten out of them is around 90 motos. If you consider how much time you put on a bike per moto, nowhere near 300 hours. I have checked on several different types or brands of bearings (some thought to be better than others) and have resorted back to the stock torrington bearing.

So, to answer your queastion, I do not feel you have found the wink link, just a bad bearing.

I have been talking w/ a wrench that owns a Dale. He has some timkin bearings on order.. He lives in Reno.. He also has been useing a spark plug that is half the price of ours, but I can't remember the name of the plug.

I don't think those bearings are a weak link either. In my Yamaha TZ, Yamaha uses the same bearings. Those bikes regurlarly rev to 12,500. In all the years I have been racing TZ's (approx 10) I have never had a failure of that type of bearing. I did have my cranks redone approx every 1500 miles. I also had a few that went to 2500 and they were fine.

Well I guess it was just a fluke failure then, just wanted to give everyone a heads up. Thanks for the replies.:usa :drink: