OldNo437
07-02-2016, 02:04 PM
so working on a Yamaha with a blaster carb, used to work just fine. Now its fine putting, but runs stupid rich, no power, and smokes up a storm anywhere past that. no issues with flooding, or the usual signs of a messed up carb. cleaned the carb a bunch of times, seat, and float are good. then it hit me looking at the parts diagram, the washer between the main jet and the carb body is missing, wtf? I know it was there, but what ever, anyhow, without that sealing washer what would it do? it looks like there's a 2nd passage off to one side, that does go through to the throat, is that to supply the idle jets etc? or does the washer completely seal off that passage? I had to grab a brass washer from lowes, so im sure its not quite the right size, if someone could share a pic of the main jet and washer on a vm606 that would be great! it would make sense, that that would cause that issue, as theres no fuel flow from the main jet with the main needle all the way down, but once its picked up off fuel flow would be too much, thus causing this issue. anyone ever see that happen?