Guys,
I got the Grom head tooling to the point that I could start modifying one of my spare Grom heads. The chosen bore is going to be 61mm for a displacement of 170cc. It will require a sleeve & a new steel head gasket, but the base gasket works, and you will not have to modify the crankcase. I machined a combustion chamber today that should be ideal for the bore. You could use the stock chamber, but you will not make the same power. This chamber is a fast burn design.
More Coming.
Brian S




I got the Grom head tooling to the point that I could start modifying one of my spare Grom heads. The chosen bore is going to be 61mm for a displacement of 170cc. It will require a sleeve & a new steel head gasket, but the base gasket works, and you will not have to modify the crankcase. I machined a combustion chamber today that should be ideal for the bore. You could use the stock chamber, but you will not make the same power. This chamber is a fast burn design.
More Coming.
Brian S



