cumbustion chamber

im trying to get a new set of pistons made from je atm
iv given them a std piston and all the info i can about the engine
but they need to know the cc of the cyl head chamber
i aint got a clue, can anyone shed some light?

gary

try redline or mesure it youself if you have a spare head very easy just need a seringe with cc mesurments on it and the valves in ans sealing proper

steve