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Shelbycsx · 10-26-2020, 08:45 PM

From what I just read this head is a 1926-27 BB head with the slanted rear casting for clearance of the firewall and fuel tank. Has anyone seen a B head that's slanted?. None of the spark plug holes are 1/2 npt all are I believe the 18mm thread and look factory threaded. The real race BB heads had 1-7/8 valves from what I read. It seems a lot of information on the rajo heads I'm reading online vary from person to person.

10-26-2020, 08:45 PM	#5
Shelbycsx Senior Member Join Date: Apr 2017 Posts: 122	Re: Rajo BB head From what I just read this head is a 1926-27 BB head with the slanted rear casting for clearance of the firewall and fuel tank. Has anyone seen a B head that's slanted?. None of the spark plug holes are 1/2 npt all are I believe the 18mm thread and look factory threaded. The real race BB heads had 1-7/8 valves from what I read. It seems a lot of information on the rajo heads I'm reading online vary from person to person.