BSA Owners' Club Workshop Discussions

The BSA Workshop => Singles => Topic started by: RTwo on 07 Jul, 2023, 22:11

Title: B50 Exhaust Valve dimensions
Post by: RTwo on 07 Jul, 2023, 22:11
Hi guys

Can anyone help me find the correct exhaust valve for my B50T?
The parts list has it has 71-1736, which according to the dimensions listed on various parts vendors sites is ...

Head Diameter: 1+7/32", 1.52 (38.7mm)
Stem Diameter: 5/16", 0.31 (7.8mm)
Length: 4+1/32", 4.02 (102mm)

The one I've taken out has a overall head diameter of 1.754" (44.57mm)
Am I measuring it incorrectly? or is there a valve with those dimensions available?

cheers

Title: Re: B50 Exhaust Valve dimensions
Post by: JulianS on 07 Jul, 2023, 22:57
I think the dimensions of the valve you took out make it an inlet valve part 71 1735 not the exhaust valve?

Title: Re: B50 Exhaust Valve dimensions
Post by: RTwo on 08 Jul, 2023, 09:57
Ahh.. of course  :-[  thank you

Drinking and thinking are often not compatible  ;D