Right, so next is the camshaft. you need to get the chain around it, and then wiggle it in place, it's a bit fiddly but you will get it in there eventually!
Make sure the notch is to the left when sitting on the bike.( I bloody hope this is right!!!)
Find DTC. There are many ways to do so, I went with peeking down the plug hole, and moving the crank back and forth until I was happy I got TDC, there is a SLIGHT non-movement area between going up and coming down. I also noticed the pin hole in the crank along with the notch for the keyway, will be at 6'o clock and 12' o clock. I placed an earbud in the hole to make sure id doesn't move while putting on the chain. ( It looks a bit off but it was just an indication, not a rule, the hole was bigger than the earbud!)
I later found it's easier to have the chain on the right of the sprocket, you will see what I mean when you do it! Make sure you have your secure life line attached at all times until you are CERTAIN the chain won't go anywhere!
(man it's hard taking pics with one hand whilst building a bike with the other!!) Start on one side. working the chain onto the sprocket. Ensure the notch is pointing at 12' o clock. This took me a few tries, so don't worry if you get it wrong, just undo it and try again. In this picture it was a bit off, but this is to show how to run the chain onto the sprocket.
This is what you should have when it's right
Now there is a notch at the end as well which you can also use as a guide.
On the flip side there is a pimple, this has to line up with the face of the bottom end, this is the time to check this is right, if not, do it again!
Clean the bearings, or get new ones, and slide them over the shaft in postion. They are going to be a bit tricky and tight, just be patient, the will go! do one at a time each side.
Next make sure the sleeves are in place in the rocker cover! Replace the o-rings while you at it, and tap them in place.
Clean all fitting surfaces, add gasket sealer to the rocker cover(easier to go round without having barrels or bolts in the way). Again, a really thin coat.
Place rocker cover in its place, and put the brass and copper washers in their places like so(some people will use rubber seals instead).
Place remaining four bolts on either end with regular washers, add crown nuts, and torque up to spec.
And the big part of the build is done!!
Now go pat yourself on your back, have a beer/whisky/brandy/add favourite alcoholic beverage here, light a cigarette/cigar/pipe/doober/bong/fresh air, and do a little happy dance in the back garden!!(well.....YOU don't have to but I did!!)