Managed to cc the head today using the perspex method and pretty confident the chambers are bang on 50cc. Will need to get the block back with the pistons to measure the piston height from the deck and the cc of the piston bowl. Plug in the numbers to an online calc and see what i need to be. I will try different combustion chamber cc’s till i get the desired comp ratio, fill the chamber up with the cc of fluid and measure from the surface to the fluid and that should give me what needs to be skimmed.
How accurate i can do all that will be a bit of a hit or miss lol but sounds gd in theory?
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