Hi everybody.  I’m a new member and this is my first post here.

I bought my MZ about 6 years ago.  A rather sad specimen off ebay that someone had brought over from Poland I think.  I got someone to weld up the cracked kickstart shaft boss and I bought a new crankshaft, piston, bearings and seals from Ost2rad.  I started putting it back together in earnest recently, but all is not going to plan.

The crankshaft is not turning easily and I think it has to be the seals.  I was sure I’d fitted them flush with the inner faces of the crankcases, but I’m not so sure now.  Is there minimal clearance between the crankshaft and seals?  What else could I check?

Suggestions welcome.

Cheers David