Hi Richard and all you are amazing knowledgeable people out there. This thing is really starting to beat me:((
So acquired a wartime 16 H engine and fully rebuilt it but actually all the internal components were really good to really. I've just restored what was already there but the piston had picked up.
Replaced it with identical piston new old stock and all good however when the Piston reaches TDC it just touches the copper of the head gasket.
I noticed on the old piston it looks like it has been turned a fraction maybe just to clear the gasket in its previous life now I know the chap I bought it off. He said his father used to race it and there's been a few Tell Tail signs of this.
Could this be the wrong piston for this bike with the crown so high?
Please give me some direction to go as I'm losing the Will a little bit.
cheers