Yet another problem

I think the small spacer between the bearings on the left of the crank was forgotten during engine block reassembly. As soon as I tighten the screw on the left of the crankshaft it is very difficult to turn it...

Part 7 :

(5 is a ball bearing, 8 is a roller bearing)
I even tried to only assemble parts 22 to 25 and nothing else (no clutch, no primary chain, no starter wheel) and it makes no difference.
As soon as I tighten 22 the crank is blocked

So I have to get the engine out... again
