HELP!!!!! 82 CB750 top end rebuild

Posted by UselessGoose on Mar 29, 2016; 5:36am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/HELP-82-CB750-top-end-rebuild-tp4059920.html

So over the weekend I decided to take my engine apart and rebuild the pistons for the first time.  I had a Clymer Manual and the internet handy as I worked my way through the process and everything was going great up until I started putting the exhaust camshaft back together.  While trying to get the exhaust chain over it's sprocket I attempted to turn the crankshaft to help slide the chain onto it's sprocket (Like you would a bike chain).  How ever now the crankshaft is stuck! (even when I hold tension on the exhaust chain)  I can't move it either way.  
- Piston 1 and 4 are not TDC neither are 2 and 3.
- I took the Camshaft out and peered into the crankcase and couldn't see anything disrupting the crank or chains.
- Put the bike into Neutral
-Oiled the pistons and cylinders as I put everything back together and sprayed some lube through the sparkplug holes to see if that would help but so far nope.

It's 10:30 on a Monday night.  Right now all I can think to do is start ripping everything apart again to try and find the issue but I thought I would try here and give it a day before getting too carried away!

Cheers
Goose!

Edited: