Blade One-Way Bearing Shaft and Shim Set B450 B400 BLH1649 Replacement Helicopter Parts

I believe the clearence between the middle main bearing and the top of the one way bearing should be slightly more then the interference fit it comes from the factory with. One or Two thousanths of an inch will do it, otherwise you will notice goves being cut into the one way bearing outer casing caused by contact with the middle main bearing. To achieve this you need to sand down the thichness of the shim that comes with this set. The main gear will need to be adjusted on the one way bearing to maintain the clearance between it and the tail rotor gear. The pinion gear will need to be adjusted properly also. I haven't found any documentation on this, to date.