You can do this work yourself. Read up on MOB's carbbie article and do not take short cuts. Do install overflow tubes. Do NOT us K/L carb kits, there are issues with them, something like a float or float clip issue, and the needles are suspect, IIRC. Plus, it's K/L. (I'm assuming the ebay kits are K/L)
The issue that comes up is iff'n you're not a carb magician, identifying what's normal or what's not. Again, refer to MOB's write up. See if you're up for it.
Good Luck, signed, a happy customer.
Disclaimer: I know SiSF.
I have no problem with the K&L carb kits, used a bunch of them, Steve has issues with the float needle clip spring, but I addressed this and we both agree if you "tweak it" to insure it isn't too tight on the float tang, it's fine...he prefers not to use that clip, and to each his own.
mdr,
you fogot to add something into all the facts and calculations you noted.....
expansion rate of gasoline, contained in a sealed (the pressure relief is not set to atmospheric pressure...it's higher by far) and the temperature at the time the tank is subject to....you may be surprised to see 5 psi on that fuel line, on a hot day, after turning the bike off after a moderate ride.
I see Bubba is coming around to my thinking on the seating pressures and such....thank you Steve, we have to believe with all the leaks we see, it is relevent.