Sorry guys that I used the wrong term for taper. The German word for taper is Konus. I sometimes should use a translator program to check what I´m writing...
Rob, I reckon, your suggestion about bending the crank putting the engine together is very likeley. I heat up the housing prior to installing the crank and mount all parts with the right temperature difference so I don´t need a single hammer blow. The only thing I do is to tap the crank twice from the front and the back after installing the flywheel with a recoilless plastic mallet (is that the right term for a mallet filled with sand or lead balls?) to sofly seat it and take any stress off the crank. After those soft blows is can be revolved with nearly no resistance. And I always use bearings with C3 bearing clearance to cope with very light bending of the crank (0,03mm respectively 0.0011 ")
xpatriot, you were lucky your parts went off so easy.That´s great!
owned bikes: 93 Ural hack domestic model, 01 Ural 750 hack
92 BMW R100GS, 92 Suzuki GSX1100G hack, 95 BMW R100R hack with Ural sidecar