Do any of you employ anthing special for tightening the flywheel? The collet and flywheel will move towards the front bearing when the nut is tightened. This will pull the 2 insides of the crankshaft ballraces towards each other. This will surely tend to bind them up. The situation will get even worse under temperature, because aluminum expands faster than the steel crank.
This must rob power from the motor?