Thanks for the replies - set the PSI to 3 - would not go any higher so will bypass the pressure gauge / filter tomorrow. Couple of videos of the engine running between 1500 1800 RPM
Have you checked the carb mounting flanges for straightness? Those might be warped due the overthightening and cause a leak which might be hard to spot
Have you tried it without the linkages attached to the carbs? You could be slightly off kilter with them and it could be holding the carbs slightly open.
1966 912
1969 912/6 hotish rod in build
1974 914 Dead
LI 125 Lambretta (Yeah right it’s a 125)
Mini Cooper s