In process of rebuilding a set of HD8s for my Mk2. When assembling the bowls I noticed that SU does not provide a sealing washer for under the float needle seat. I purchased a major service kit from Burlen so expect all seals would be in the kit. On the HD6s I took off the car they did have seals under the seats, but also noticed the tech drawing shows no seal.
I assembled without seals and did a leak test with air (certainly much more pressure than the 2 psi fuel pressure) and one of them leaked.
Anyone have experience here? Needles are Vinton tipped standard needles.