Pre Unit Triumph pressure relief valve springs
Hi all, I'm slowly piecing together a 1955 Triumph T110 engine. Just wondering if anyone has detailed info on the pressure relief valve springs E2788 and the short one E2789. I want to check what the lengths should be? I can find data on the later unit engine without the tell tale, but not the pre unit. I've been playing with Triumph engines for many years but never had cause to strip the valve out before! Thanks !