So I am having some difficulties in a Cafe build. I am pretty decent at mechanics and I can easily look at something and figure out how it works. What I did: I pulled the top half of the engine off to change the gaskets. I put everything back together just how I took it apart. The motor would turn freely with no problems beforehand. After everything was put back together, it would turn freely as well. I was using the flywheel and a socket to test it. I tried to use the kick start very slowly to make sure there was nothing wrong there. I pushed it through one time, worked like a charm. then the second time, it locked up. I went back over to the flywheel and reversed the motion less than half a turn, then could freely spin the motor again. Tried using the kick start and it would work 5 or 6 times in a row, then lock up. I did not do anything with the crankcase part of the motor, only did the cylinder heads and up. Thanks guys!