Hello fellow MZ ers! I am restoring a currently non running 1980 ts250/1, and attempting to replace the main crankshaft oil seal on the right side. I have read that a 10mm bolt can be used through the armature to facilitate its removal from the tapered shaft. I have tried a couple of m10 bolts, but they don’t seem to want to go in. Does anyone know what the thread pitch would be for such a bolt? Am wondering also if the internal thread on the armature may be damaged. If anyone has done this job, any thoughts would be much appreciated. Cheers Andre