Thank you Schoemrich for the barrel ! I collected it last night....you have a nice bike project XT there mate, I am looking forward to seeing that coming together in the New Year!!

CP have returned my email and confirmed a 686cc 102mm 11.5:1 CR piston.
Kev is pointing me towards this, thank you for your input mate, but I would like a 700cc conversion...

So, I'm going to go with the JE piston kit, a 700cc 103mm 11:1 CR piston. (a Standard bike has 10:1 CR, so this is still a good compression boost.)

I have now ordered it today, and will wait for it to arrive from the USA, so that I can take the new piston and the barrel to the machine shop to get a match.

I am hoping to see gains on my bike of around 10hp..this is my estimate..

My Standard Bike with PC111 44.50HP
With DNA St.3 airbox and CCC 50.00HP (49.01 so far -not been fine tuned)
With JE 700cc Piston 11:1 53.00HP
With a gas-flowed Head 55.00HP

I am hoping that the standard throttle body can chuck in enough air/fuel to make it work properly.

Torque wise, I am looking a similar gain of a total 10ft/lbs.
Torque gains in the low to mid range - is the really important part of the Project for me...

Money-wise for just the 700cc conversion, my estimate,
Spare barrel �60
Machine/ plating �130
Piston kit �115
Top end gasket �37
Bottom gasket �10
Oil sundries �20

Total �372


Now, I am turning my attention to the cylinder head. I am thinking of keeping the standard valves, in order to keep the torque gains to the maximum, at lower revs. I am keeping the Standard Camshaft. Or would bigger valves still give as much gain in low revs?
So, I am looking for a cylinder head.....anyone??