Recent carbs VS classic GS500 carbs

[Pigeonroost]

My GS5 is an '08.  I have not yet entered the carb, there has been no need beyond curiousity.  From what I have read here, I get the impression that the newer vesrion of the carbs have a mid range jet along with the idle mix and high end jet.  Where as the earlier editions have the traditional idle mix plus high end jet. Is that correct?

If so; is the mid range jet shimable as well as the high jet to get a slight enrichment of the mix?  And, if so, what combinations of shim washers have been helpful with stock set-up of airbox and exhaust?  Mine runs as if it is pretty lean  (demands the enrichment lever to be wide open, even on warm days before starting and a fairly slow weaning from the enrichment device as it warms); but then again it runs well overall, thus I have talked myself out of fixing what ain't broke, but I likes t' tinker about.

prs

[The Buddha]

Jets are only replaceable with larger sized ones. AKA bigger holes.
You shim neeldes only and the old and new carbs still only have 1 needle.

Yea however there is a mid jet you can replace in the new carb, though most beople get it just fine with washers ... I do sell mids at the rate of 1 in 5-6 ... presumably they are buying it just in case they couldn't get it right on the needle alone.

Cool.
Buddha.

[black and silver twin]

old carbs = mix screw; pilot jet; main jet w/needle
new carbs=mix screw; pilot jet; mid-jet; main jet w/needle

[lamoun]

  http://gstwins.com/gsboard/index.php?topic=49927.0