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Hi Wolf,
Sorry for the delay but I was having some problems with with the resizing software on my computer, (to make them less than 2MB for posting) which keeps 'squashing' the picture. I've sorted that now
JPrecision also welded up and slightly relocated the spark plug hole as a 12mm one. And also provided the valves, nicely lapped in.
But not cheap. (I sent my heads to Canada from the UK)
I actually bought a 350 Pantah, that someone had converted to 539cc using 650 pistons and the original 51mm stroke. But I separately bought some 650 crankcases (from an Elephant I think) as they have slightly stronger cast webs around the main bearings, and I read that this was a better option. But I am having to modify the swinging arm pivots to match the 750 Sport Verlicchi swinging arm I am using.
I also bought a pair of what I hope are Santamonica cams (I won't know for sure till I check the valve timing..) That will be a while yet. Looking at Ian Falloon's book, it seems that if I advance these cams approximately 7 degrees, then the valve timing should pretty much match the race spec TT2 cam timing. I'm not sure if that's good or not.
Reading some of Brad's articles on Ducati cams it sounds like I should probably throw them in the bin!
Anyway, it should be fun makings sure nothing touches, with the Pistal high compression pistons installed.
I have a pair of 40mm Dellorto's to try to fuel it.
And I have bought a later (wider tooth) 750 gear set too
I'm planning for the bike to be a classic track bike, as I get older...
It's all taking a long time as I work abroad a lot and don't get to attend to things regularly.
But at the moment with UK lockdown rules I'm mostly in the garage.
Cheers
Rob