PGO G-MAX200 - Check for the Flatness of Cylinder Head & Cylinder; Combustion Chamber Cleaning

E. Check for the flatness of cylinder head & cylinder.
Check the flatness of contact surface of cylinder head & cylinder.
F. Combustion chamber cleaning
zClean out the carbon piled up in combustion chamber.
zDo not scratch the combustion chamber and contact surface of the cylinder during
cleaning operation
Limit of use: If it exceeds 0.1mm
Change a new one.