I've been reading this thread from the beginning. My heart goes out to all those well meaning guys trying to apply all they've learned from their 750, 650, 550, & 400 projects and appling it to the 350.
Fact is, there are subtle differences between models. Unless you've seen or worked on these, it's a guess, albeit an educated one.
No, I haven't worked on any 350's either. But, I too am well meaning. AND, I do have an old clymer manual printed in 1975. On Page 100 they have an exploded diagram of the cb350F carburetors. Assuming Suke's bike is stock, I see 7 hoses going to them. 4 at the very bottom of the carbs are the bowl overflow hoses. 3 angle upwards and are between carbs 2&3. 1 of these is the fuel inlet from the tank petcock, possibly larger than the others. The other two are carburetor bowl vents, that eventually route to the same place as the carb bowl over flow hoses.
Having said all that, I really think you ought to follow Linda's advice. Drain carb bowls, if chunky bits come out, work back to the source, etc. Keep it simple until you are forced to do something more involved. DON'T remove carb bowls or overhaul carbs until there is clearly no other option. No, it's not particularly difficult. But, neither is flying a plane after proper training. You have a running bike that needs a bit of attention. Don't overhaul every bit of the bike for one small problem.
Now, I think, it's your turn to pick up a tool and actually touch the bike with it. The screwdriver you use must fit and fill the length and width of the slot. If what you have doesn't do that, you need to get another tool. Or, risk mucking up the slot in the screw head. I find that gunsmith screwdrivers preserve sloted heads the best. These aren't taper grounds tips that cam out of the slot, but flat ground, that transfer torque to the entire depth of the screw head slot. While I don't use them all, all the time, I must have 50 straight slot screwdrivers, or driver tips, I've collected over the years. It's rare that I bugger up a screw head. When, I do it's usually because I was too lazy to go and get the right one.
Cheers,
