Hey again, all.
Been working on this bike for about five, nearly six months straight now, and so far your help has been invaluable.
I started working on some of the final bits before I can actually ride the old girl around, but I'm stumped on this one problem.
My bike's a 1999 VT750CD2, and I've rebuilt the carburetors, and the jets look stock, at least from what I can tell. I made sure the floats were set to 7mm per manual spec using the mechanical test method, the one where you blow in the fuel line and push it until it closes. Everything seems to be working well with both, both diaphraghms showed no problems, jets and bowls clean as factory.
Here's the problem. Rear cylinder adjusts with the pilot screw no problem, bogs down, chokes, all that goodness. However, it doesn't do that on the front cylinder. Additionally, when I rev the engine, at around the >60% mark the engine starts bogging down. At full throttle, it sounds like it runs, then cuts out, then runs, then cuts out. Like a Vrrrrrrrrrrrrmmm! ... Vrrrrrrrrrrmmm! ... Once the throttle is released, it falls back to a nice happy idle. It also sounds like there's some escaping gas somewhere, but it's not coming out of the spark plug ports. I figure it's a cracked carb boot, but from what I'm reading the symptoms don't match up. One is cracked and I ordered a new one, but I'm not sure it'll fix the issue.
Here's a quick video of the problem. I cranked the throttle to full in the start of it, so you can hear the issue.
Mind, this is my first bike, and I still don't know exactly what it should sound like. Best approximation I've heard is from videos, since Harley owns the motorcycle game in the town I'm in. I do know that what it's doing definitely sounds wrong, though.
Any of you gearheads got an idea what it might be?