My 1.5 HP 2-speed Newport didn't have a head gasket on it when I bought it. I know some Puchs don't need one, but I don't know whether mine is one of them.
It's a 1.5 HP 2-speed with the high-torque cylinder. The cylinder has the number 11 stamped on top of it. The mating surface between the cylinder and head is flat, there's no groove or anything.
Do I need a head gasket?