Ready for startup

6 days and 6 Nights later I´m finished with the overhaul after the Exhaust valve dropped into the front cylinder. The crank and rods are refurbished and the heads are as Zero set as they can be.Seats, Guides, new tins and spring washers.Most challenging has been to produce absolute round Seat recesses as the weld repair did pick up carbon from the iron, and hard it gets.In the Sunnen the borehead has two cutters and the solution was to run on very  low RPM with only one. Then when ran in to the same problem cutting the seats using a typical set up where the cut extend outside the seat to match the surface to make the smooth transition, worked around it by becoming dentists using a 700000RPM grinder to remove hard material very precisely. all well the bike is completely ready for start and I´m celebrating. Nothing would have been possible without the help from Cala Steimar at Calas High Performance. Everything done or parts used was checked and double checked, one of the new intake valves was found to have variation to the stem dia, so it was honed straight by using a diamond setup, and one of the new tins had to be opened up after found having the scavenge tube soldered complety shut,

Honing hard chromed stem

    

The Front Head after the failure

The same head after restoration