I received this cylinder head in a bunch of Norton parts a while back. I’m not sure what it is for. It appears to have at least the intake ports heavily modified and the exhaust ports opened up as well. It has a casting number 25316 on the bottom and the number 7 cast into the top, there is also a small “V” stamped into the top.
Some dimensions:
Intake ports 35mm, Exhaust ports 36mm,
Intake valves 1 1/2 inches, Exhaust valves 1 3/8 inches, carb/manifold stud spacing is 2 1/4” and the…
Some dimensions:
Intake ports 35mm, Exhaust ports 36mm,
Intake valves 1 1/2 inches, Exhaust valves 1 3/8 inches, carb/manifold stud spacing is 2 1/4” and the…