Hey guys, I'm having trouble with my engine. After putting the top end completely together, I tried manually spinning the engine. It moves rather easily until its time to lift the valves. At this point it gets really heavy, then springs forward and turns easy again until next cycle. The cam chain is really tight, even without the tensioner. Is this normal? Chain si supposed to be new, how tight should it be, Clymers says nothing about it. Moose? Anyone? Regards.