Warning Long post but hopefully helpful to some.
So following on with the 79 RD250 build with earlier 350 barrels I think I'm getting somewhere slowly. I have sorted the exhausts with a set of RD400 chambers with custom made spigots on the barrel, the 350 is much narrower on the width of the studs, also the port is lower than the later 250 and 400 but we've got around that now. Something else that I hadn't considered until somebody pointed it out is the intake port is also in a different place, its lower and has a slightly different angle, this is not a problem if you use pod filters but I want to keep the standard airbox. I can make it all fit with the standard parts but there is a slight difference in the angle of the port so my question is can I mount the carbs slightly angled? I'm thinking to make a spacer for the reed cage with a 2mm offset top to bottom, this would make the standard airbox boots fit perfectly, I know that one of the tuning tricks on these is to put a spacer in the reed cage anyway. So any carb gurus got any input please.
yes you can. typically on mikunis there is a 15 degree variance from 'level' you can work within and not really change anything. IF you have to angle it more, it can be compensated a bit by changing the float level to suit. as long as the pilot jet gets fuel, you are ok. also, when warm you don't want the fuel to creep higher than the bottom of the venturi.