Idle Circuit on my 3C

  • Thread starter Thread starter laverlesmains
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laverlesmains

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I was out running on the highway yesterday when the bike started to bog a bit.  I thought my fuel level was fine, but switched over to reserve and although it picked up again I headed for the nearest exit and gas station.  I topped up the tank w/ a couple of gallons, but the bike needed to be started with a little choke, and was really rough at idle and bogging when starting from stoplights all the way home.

Thinking I may have somehow picked up some crap via the fuel lines I took the carbs apart to check all the circuits, jets, and blow them clean with compressed air.    Apart from sludge here and there, I noticed that on one of the carbs I could see right though the idle jet circuit - ie. if I held a bright LED flashlight where the idle jet screws in, I could see the pinhole of light while looking in from the top of the carb body.  On that same carb I could run a very thin wire right through the circuit (following the path of light).    On the other two carbs I could not seem to run the same piece of wire through the circuit, nor could I seem to see the light....   

Question - does the idle jet circuit run straight up to the carb body and therefore I should be able to see a light held under the circuit?  or does it take a bend somewhere in it's path?  Also - why would 1 carb be different than the other two wrt to this path.

Cheers, Tim
 
On the other two carbs I could not seem to run the same piece of wire through the circuit, nor could I seem to see the light....
Click to expand...

Some of us have seen the light and fitted Mikuni RS36s... :D
 
progression hole,  fig 20,  item 2  ??

progressionhole-fig20item2.jpg


& ya don't need any farken Mikuni's.    8)

Mark
 
as Marks diagram shows the pilot hole you could see from the top of the carby would show light through iff the jet was out it is quite a small hole if the jet is in, but the idle circuit that is fed from that jet is at about 45 degress in the front of the carb rought just behind the insuator it is a very finehole a 1mm drill should go through it they can block up.
 
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