M200 cylinder head "s58" for 58 stroke

Facts:

-Combustion chamber is 0.3mm deep in the head

-Central spark plug M14 long thread

-Piston stand-off 1.0mm with 1.3mm squish band. No head spacer needed for reasonable port timing

-Finally moderate compression with long stroke

-18.4ml @ 1.3mm squish band results in 12.1:1 with 58mm stroke

-Cylinder head outer contour = M200 outer contour

-Fits common cylinder shrouds for M200 (builds a little flatter)

-Countersinks for Allen screws with 12mm diameter, so that washers can be used

-Screw length 6x25 and thus 5mm shorter than standard

-Omega combustion chamber for faster combustion

-Additional bores at the cylinder bolting positions to be able to disassemble the cylinder and head.