found problem w/carb

If the pic comes through, the center jet (the bigger of the two) was completely out of its seat and setting on top of the float when I took the cover off of it. That would be the cause of my dumping so much gas and running really rich would it not. Carbs look pretty clean, probably should clean them again since they are off huh?

 

yep that'll do it, did you find the copper washer?

 

yes believe it or not it was still one the jet. Got any idea on the richness issue. I pulled the plugs and all 4 are jet black. Everything I have read so far shows a good plug as a grey tone. Am I right or wrong. Any help appreciated. I smell unburnt gas through the exhaust before, was that the jet falling out of it's seat?

 

the smell of gas would be consistent with a jet that fell out........that much fuel would indeed cause a cyl to run extremely rich if not totally swamp that plug.

It is not an unheard of issue......the first carb clinic I ever attended---One of the guys was working on trying to balance a set of carbs and after many many trys, and irratic firiing, decided to pull the rack and see if something was up inside. Opened the bowl on the malfunctioning carb and sho-nuff.....there was the jet rolling around in the bowl. Put it back in, and we all had a great ride shortly after.

Dave F

 

that's what I needed to hear cuz I had the carbs cleaned at the local shop here. I clunk tested them and they are fine. Crazy thing the one jet fell out and the other 3 were finger tight. They look extremely clean as you can see in the pic so I believe I am going to put them back together and ride it. What do you think?

 

If your shop forget to tighten all 4 main jets I wonder what else they missed? Knowing that I would remove the jets and mixture needles(don't loose the small o-ring) and blow out all the passages.

 

yeah, good suggestion. Thanks guys will try to finish it this afternoon after work, who knows, may be riding by nightfall and off Monday & Tuesday that is a good thing.

 

MMmmm...

If those guys were that hopeless, I wouldn't trust that they set the float levels correctly either; which would also explain why you're seeing sooty plugs on all 4.

Accurately wet-set (or at least wet-verify) the float levels in each carb. I wouldn't trust that shop to have done anything correctly.

Valves in spec? You won't get a good vac sync if they aren't...

 

adjusted the valves before I took the carbs off. Has not been started since changing shims. All eight were a little off, not as bad as I thought they would be. what do you mean wet verify?

 

I am sorry I should have said I have not tried to start it since I adjusted the valves.

 

"Wet Verify"

Visually, verify the FUEL LEVEL within each Fuel Bowl.

You hook-up a CLEAR Vinyl Hose to the Fuel-level Test Port onn the back-side of the Bowl.
Hole the Hose up ... along-side the Carb Body.

Loosen the Fuel Bowl Drain Screw until the FUEL in the Bowl exits the Test Connection and RISES in the Hose ---> To the LEVEL of the Fuel inside the Bowl that the SETTING of the Float allows.

You can SEE the Level by observing the Height of the FUEL in the Hose.

The CORRECT LEVEL is just above the TOP of the Lock Washer of the Screws holding the Bowl to the Body.

::::: Clear Tube Verification ::::: DRY Measuring w/ Home made Tool :::::

 

Richness is courtesy of the YICS system.
With the one carb just dumping fuel in, it would get to the YICS and get mixed into all 4, making all 4 super rich and providing fuel vapor (rather than pure liquid fuel which wouldn't explode at all in that cylinder) which is why you have to use a YICS channel block when syncing.

 

Rick,

I am trying to understand how the right half of the picture helps? What are you measuring/what value do you want to achieve?

 

It THIS Test.
"Clear Tube Test"

You hook-up a Clear Tube of Vinyl Hose to the Fuel Bowl Test Port.

:: 1-Inch of Washer Hose -- Right Angle Hose Connection -- Vinyl Hose ::

You connect the Hose ant Open the Drain.
Gas fills the Vinyl Hose to the Level within the Bowl.
The Level rises in the Hose to where the Float is Adjusted.
You compare the Level shown in the Hose to the Chart.
Red = NG
Green = Perfect
Yellow = Within +/- Spec
Red = NG

The example shown is a Mikuni Bowl.
The Hose fit INSIDE the Test Port.
Hitachi's have Nipple Port.

 

The Right Photo shows a Fabricated Tool.
Its a Mechanics Pocket Ruler w/ a Toothpick glued on the Slider.

When you find a Carb with an IDEAL Float Height during a preliminary Clear Tube Test ... the Floats will be at a Measured Height ---> Dry!

You Set the Slider to the Top of the Float Material ---> On the Carb with the CORRECT Level.
Then, ...
You Adjust the INCORRECT Level Carbs Floats ---> to the CORRECT Height
by bending the Tabs get the Floats to be at the Correctly Set Level that the Tool is set too.

 

Thanks, that makes sense now.