I never wrote up my engine build as it took fewer questions but had as many quickly covered up mistakes that I made on the way. Fortunately I started with a big enough pile of engine bits because I had a pile of bits off two engines I was merging with some new stuff. That was the one that lasted 27000 miles until a valve with a 50000 mile history decided to become two bits of metal at 4000 rpm.
Thats nearly as good as the £10 calipers I used to build my engine which sometimes had a zero shift of about 0.2mm if you simply opened them to 50mm and closed them.. So you had to measure everything 10 times and then take the mode.
You say tomato, I say tomato. I had a 1970 CB750 Honda that trashed its main bearings, ruining the crank, which can’t be re ground. A friend of mine borrowed an electronic internal bore gauge from work, £1500 worth of kit. I torqued up the cases and measured the hole where the main bearing shells go - it was a hairs breadth undersize. How can a hole possibly get smaller? It turns out the idiot that ‘restored’ the bike in South Africa didn’t mask the journal carriers when he painted the cases, inside and out. That thickness of paint was enough to kill the crank, the tolerances are very fine.
We’ve gone off track , @Soggz have you bored out the syndrome tubes and put in oversize Derryvalves on the DMPs
I did all that, but then the Derryvalve clearance’s dropped into the sump and blocked the oil strainer. Managed to get some more from Mssrs F’Tang F’Tang Ole Biscuit Barrel.
