Search Messages

 
Author:
Search Start Date:
Search End Date:
Sort Order
Sources to include:
OR Message ID:
 

Display Mesage #94316


Carb balancing - how hard is it?
Written by nathan_c_harris on 6/21/2010 at 03:58 pm

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 cover
off, making it alot easy to find and adjust the Sync screw. Don't try to really
rev it, although you have to blip it a little to re-seat the linkage in the
Carbs.

When I did it I was worried that it ran so crappy with the air filter cover off,
and thought I had screwed up everything. Turns out these CV carbs really need
the back pressure (vacuum) within the airbox to work correctly. So when you try
to rev it it will cough and sputter, etc. Just get the carbs so the oil in the
line is even.

I used a 20' piece of 1/4" OD vinyl clear tubing from Lowes. Some ATF I had
laying around, and a hypodermic needle thing from an old fish tank doodad I had
years ago to get the oil into the tube. A tiny funnel will work, or whatever.
Getting the oil in and settled is a PITA.

Once in just find the vacuum points on the carbs. One the left side is just to
feed the vacuum actuated petcock, and on the Right it's on the front right side
and is capped off with a little rubber nub. Pull off that nub, and the vacuum
hose to the petcock and slide on the vinyl tubing on either side.

Make sure that both sides are on tightly because if it comes off on one side the
other side will suck in all your oil and not only it is smokey, you have to go
through the whole getting oil back in the tube again. I actually used a needle
nosed Vice Grip pliers to crimp the lines till I was ready to expose to vacuum.

Then adjust the screw till they are even. Button it all back up and you are
ready to go. My bike is very noticeably smoother on the road now. Then just
hang onto the line for the next time.

Nate

--- 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 #94316

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