Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
There's a sectioned schematic of it in the original 750 manual (doesn't appear in last one) that may help, check Ash's dropbox stash for a look. If not there I can photo and post from mine.
As PaulG has said, you are in there and you don't want to take it apart again as Paul G knows very well Look at changing the primary chains, cam chain to a up graded FTH DID, all the o,rings, including oil pump and inspect the primary chain tensioner to see if it has gone hard and brittle, check the cam chain tensioner, mid wheel and cam blade for brittleness, cracks or chips. Check the piston rings are not suck in there groves and turn easy. I would throw another set of rings on to be on the safe side and they can be bought for around £40 for a full set. Always use a top quality gasket set and upgrade the O'rings that are in the kit.Put the crank on a bench and put all the rods on in the correct order and the right way round, torque them up and make sure they turn on the crank very easy with no tight spots Build up the bottom end first and test everything before even temping to put the top end on.We like pictures so, loads of photos as you go and we can advise if something is not quite right.
so most bits on order now (ouch).Without wanting to start too much of a debate what's the best / recommended sealant for the bottom end? I've seen other posts but not really a conclusion.