Another update. It's nice to get to the interesting bit, the cleaning and prep is all part of it and very important but a bit of a bore! Now starting engine assembly, so far few surprises but one was a bodge job on a repair to the final drive assembly tensioner securing bolt. At some point it had pulled out of the bottom casing, the previous owner will have had to pull the motor, split the crank case and then, using a hand drill, drilled a wonky hole through the bottom of the case. I set the bottom have of the case in the milling machine and machined a flat surface on the bottom of the case, drilled out the bad repair with an over size bit and re threaded out to 8mm with a flanged nut on the bottom of the case as extra security.
Set the crank up in the lathe and dialled the centre journal for run out. Max is .002", it was slightly over so I corrected it with a hammer. It's a forged steel crank and that method is acceptable. Installed all the rods while crank was in lathe and used Lucas assembly lube for that process, new cam and final drive chains placed on crank as well as new rod bearings.
Installed transmission gears and shafts along with shifter drum in bottom and top case half's. Have done another dry assembly to ensure all is good, will button up bottom end tomorrow. Probably more detail than is required!!
Could someone please orient the pictures right way around, it would be greatly appreciated!