Replacement cylinder head for the BGM Pro 177cc cylinder kit.
CNC machined from solid aluminum. The combustion chamber is designed so that it is immersed in the cylinder and thus ensures the best possible seal. It also allows you to vary the steering angles of the cylinder without having to machine the cylinder head.

The combustion chamber is designed in such a way that very narrow squish dimensions can be run without increasing the compression too much. So even 0.8mm is possible without problems, the compression ratio is still a very healthy 10.7:1.

The head can therefore also be used without modification on a Parmakit 177 to further increase performance by reducing the squish edge dimension. To do this, the appropriate squish edge must be made with matching head spacers. The BGM head has a dimensional difference of 1.5mm which the combustion chamber of the BGM cylinder head is sunk deeper into the cylinder.

Spark plug: Long thread NGK B9ES or Bosch W2CC/W3CC