Having a JIS screwdriver makes working on these machines so much less frustrating! Also it's pretty easy to tell if a screw is JIS because they almost always will have a small dimple somewhere on the head.
Hey, when you're setting your air mixture screw I am starting at 2.5 out, but man I gota back that thing out to like 7 to make it idle decent. Did I miss the pilot jet circuit or that other one beside it in the inner body?
Great video, I just picked up a hurtin' 86 Yamaha Venture XVZ 1300, the person had rebuild the carbs do to flooding and could not get the right front carb to stop. I had it apart twice before I found the problem, I am a retired auto mechanic and have never seen this before. Maybe it is something that you see in bikes , I don't know. I noticed that one float needle seat was brass but the other three are grey, I checked the seat length and the brass one was shorter by a good 1/8 inch. Once I bent the arm on the float up the needle stopped the flow when I blow through the line. Is that something that you have seen in your many years working on bikes?
Absolutely not. It sounds like someone tried to get the seat out and damaged it and replaced it with one from another carb. I don't think those seats come out. They are pressed in. I will check. Yeah, the 1988 and newer models had one hold down screw that held the seat in, which had an o-ring on it. I don't think those seats come out. Or that one carb is from a different model.
It does sound pretty rough. If you didn't take the idle circuit jets out, that is more than likely your problem. I just bought a four carb rebuild kit on Ebay last night for $30. I see there is another guy selling them for $12 each. I would highly recommend a total rebuild of the carbs. Also get 4 new spark plug boots. NGK preferably. You will only have future problems if the stock ones are still on the bike.
Not a bad video but could have been a lot better without trying to look through the top of your head every time you wanted to see what you were doing..🥴
