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Display Mesage #94319


Carb balancing - how hard is it?
Written by skyeenter on 6/21/2010 at 04:47 pm



Dork, here are the steps I do:

Ride bike for 20 minutes or let idle until fan comes on and goes through a
complete cycle of on/off.

Remove:
Lid/Vent covers - remove screw holding side cover on, careful this screw is
threaded in fairing plastic not metal.
Side covers - put some silicone grease on the rubber grommets when reinstalling
Steering head meter panel covers - silicone the rubber grommets
Shelter - you might have to remove the seat if the shelter is tight
Air Cleaner Box

Tools:
Long blade 9" phillips screwdriver
Short phillips screwdriver for tight areas if carb bands are on backwards.
Rubber tubing 6" - 10" long - this is a right front carb mod for synchronizing
unit hose attachment.
Some type of hose clamp for the open vacuum hose. I use a hemostat or just plug
it with a screw or bolt.
Parts diagram to identify tube connections on carb.
Flashlight/trouble light

Method:
Once carbs are exposed identify the tube connections. On Carburetor Assembly
parts diagram identify item #3, the tube cap. This is one of the most difficult
parts to get to without taking the carbs off. Do not lose this tube cap.
The bike will not run with this vacuum tube open. I use the hemostat clamped on
the end and a flat blade screwdriver pry to get it off. If you drop it into the
mysterious hole of no return you'll have to fashion something for replacement.

That's where the mod comes in. Get a 6" - 10" rubber hose the same size as the
ID of the tube cap and attach it to the outlet. Thread the hose around to the
rt. side of the carb where it's more accessible. Find a hard plastic tube the
same size as the ID of tube cap. (On the left side of carbs is the vacuum hose
routing from the petcock to the carbs. There is a black plastic T connecting
the three hoses. You want something like that.) Tag this hose with something
indicating that you have lengthen this hose for easier carb synching. So the
next guy knows what it's for.

Insert your plastic connector into rubber tube. Connect your synchro line to
the plastic connector.

On the left side, at the already mentioned black plastic T remove one of the
lines and connect your other synchro line. Clamp/plug the open vacuum line.

Identify adjusting screw location between carbs. If you want, if carbs are
really out of synch, adjust screw by eyeballing to 50% equalizing of carbs.
This gets you in ballpark range and can be used as a short term fix if in an
emergency or do not have a carb synch unit. Once you get to just about even you
can do a lot of synching just by ear.

Reinstall air cleaner box. Make sure the two fingers on the tube that protrude
over the throat of the carb are visible and fit over the guide. They sometimes
hang up in the throat and can get pinched off if treated badly. Reseat and
tighten the bands.

Start your engine and let it warm to idle again. Don't do anything in the
process until it's properly warmed. Adjust idle to 1200 - 1300 rpms.

Shine your flashlight down the "peep" hole of air cleaner. Identify adjusting
screw. Insert screwdriver down hole and hope you find it on the first try.
Keep trying until you feel the tip snug up and become firm in both directions
and the engine sound changes slightly.

Start adjusting. You'll notice a slight drop in engine rpms when turning the
screwdriver when you put pressure on the throttle adjusters. Hence, the reason
for increasing the idle rpms.

The least painless and, what I've found that works for me is, if you stall and
kill the engine remove the synch tubing and replace the tube cap and vacuum
connections. Engine should restart easily. Increase rpms slightly to prevent
stalling again. Reinstall carb synching tubing and start over.

I try to check my synch at 3000 rpms but that can be difficult because keeping a
steady 3000 rpms is not easy.

Once it's done you will not believe the difference in performance.

Good luck. skye

--- In ipcrc@yahoogroups.com, "pc800dork" <dokiedo@...> wrote:
>
> What panels have to be removed to get to everything? Any good tutorials here?
>

Message Thread for message #94319

pc800dork
6/21/2010, 03:05 am
Carb balancing - how hard is it?
What panels have to be removed to get to everything? Any good tutorials here?

    nathan_c_harris
    6/21/2010, 03:58 pm
    Carb balancing - how hard is it?
    It sounds harder than it really is. Go online and look up the $1.55 Carb Sync tool, build one. Super easy. Hardest part was getting the ATF down into the skinny tube. Now, since Carb Sync is done at idle, you can do it with the Air Filter

      israel_96gtp
      6/21/2010, 06:56 pm
      Carb balancing - how hard is it?
      "Hardest part was getting the ATF down into the skinny tube." Referencing building the $1.55 balancing stick, after doing it the hard way myself, the easiest (and most duh-simple) way to get the fluid in to the tube is t

        nathan_c_harris
        6/21/2010, 07:01 pm
        Carb balancing - how hard is it?
        Ha! Yeah, that's WAY to easy. At least this way even though it only costs a $1.55, you really feel like you *should* have paid more since it took like an hour to get it in and another few for it to settle. Doh! --- In

          pc800dork
          6/21/2010, 07:09 pm
          Carb balancing - how hard is it?
          THANKS GUYS! That sounds like a fun job to put off until I have a nice cool day of 90dg or lower! Sucking the fluid into the tube from one end is a GREAT idea. --- In

            elden_miller_96
            6/21/2010, 07:38 pm
            Carb balancing - how hard is it?
            I built mine & affixed it to a board to be left hanging in the garage. Over time the ATF settled itself into place. Of course I constructed mine in the dead of winter but I am sure in the heat of summer it may settle in quicker. In th

              obijuanak
              6/21/2010, 07:46 pm
              Carb balancing - how hard is it?
              Of the port is not open, then no fuel will flow to the engine and it won't run. Thus, you won't be able to synchronize the carburetors. Sent from my iPhone On Jun 21, 2010, at 11:38, elden_miller_96 <

                elden_miller_96
                6/21/2010, 08:56 pm
                Carb balancing - how hard is it?
                Juan, I did not have to disconnect the petcock hose. Both ports for syncing the carbs were available without pulling the petcock hose. I just attached hoses to the columns & adjusted away. Now I am not sure if I did it right. BTW - bo

                  daviddockstader
                  6/22/2010, 01:39 am
                  Carb balancing - how hard is it?
                  What's your petcock hose connected to? From the factory it comes connected to the balancing port. Did someone already put in a T with a cap? --- In

                daviddockstader
                6/22/2010, 01:35 am
                Carb balancing - how hard is it?
                I don't know how others are doing this, but I had no luck with applying vac. to the petcock and then pinching the hose off. I used a T fitting so I had constant vac. on the petcock. I do agree with everyone who says this makes a big differenc

                  wkaufmann2000
                  6/22/2010, 06:50 am
                  Carb balancing - how hard is it?
                  David schrieb: > I don't know how others are doing this, but I had no luck with applying vac. to the petcock and then pinching the hose off. I used a injection syringeto apply vacuum to the petcock - worked great ! -- Regards

                    awhombre
                    6/22/2010, 08:47 pm
                    Carb balancing - how hard is it?
                    Here's a little added benefit from my carb balancing recently. I did mine just to see where I was after owning my PC for a few months. They were very close. Someone had mentioned making the mixture a little richer than stock from the factory.

                      gclarkv
                      4/20/2012, 12:32 am
                      Carb balancing - how hard is it?
                      I think my PC runs rich, so I'm interested to know how yours has fared since you adjusted the mixture. Any problems from running too lean? Overheating? Pinging? Still getting great gas mileage? Thanks, George --- In

                        wynndungey
                        4/20/2012, 07:17 pm
                        Carb balancing - how hard is it?
                        Changing the idle mixture is pretty easy. Changing the main, requires changing the jets or needles. If your jets haven't been screwed with, maybe a carb sync will get you back where you want to be. Otherwise, a full carb rebuild could be in y

              dndgentili
              6/21/2010, 10:27 pm
              Carb balancing - how hard is it?
              My guess is that way you will continue to get gas flow to the carb. bowls. VA Dan --- In ipcrc@yahoogroups.com, "

          israel_96gtp
          6/21/2010, 07:11 pm
          Carb balancing - how hard is it?
          Trust me, I did it the hard way -- pretty sure (and this was 10 years ago...) that I tightly gripped the tube in my hand, using my palm as a funnel, and created a complete mess trying to fill part of the tube. Figured I would share a tidbit o

    skyeenter
    6/21/2010, 04:47 pm
    Carb balancing - how hard is it?
    Dork, here are the steps I do: Ride bike for 20 minutes or let idle until fan comes on and goes through a complete cycle of on/off. Remove: Lid/Vent covers - remove screw holding side cover on, careful this screw is thre