I have a 2006 YZ450F and adjusted the valves. vales clearance is spot on BUT when I torque down the cap (10nm) on top of the cam the cam gets tight to the point that it wont move freely on the exhaust side. With no tension on the cam chain the intake side moves free, the exhaust side is tight unless I loosen the cam cover cap. 1/2 circlips are in the bearings, circlips slides into the groove in the cap and that should line up the cam in the head (journals) correct ?? It seems so simple, I don't see what I'm doing wrong. There are no marks or any issues with caps or the head, any ideas would be greatly appreciated.