Originally Posted by
Roelof
Are you using a one side seal bearing or a 2 side seal?
Most engine bearings are only sealed at one side so you can try a 2-side sealed bearing.
But normally the construction with the groove in the crankcase and crankshaft should build up an hydrolic seal. Problem could be that today's fuels with less oils and also thin oils make the working of the hydrolic seal much worse. In the past we were used to run metal sealded bearings which are open.
Guys,...thx for all the expertise! I really appreciated it. The front bearing is a ceramic one from TKO which had 2 seals. I removed the inner one for lubrication purposes but maybe this was not neccessary. I had the crankcase cap on nicely sealed with a high temp sealant but it wasn't to be from crankshat distance point of view. I still could try using only 3 bearings instead of 4 leaving plenty of space to shim the clutch bell. Will try this first and see how it goes. It has to be said, the 4 bearing clutch bell has virtually no radial play and feels smooth as a whistle.
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