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Originally Posted by polex
I sprayed the carburetor cleaner inside the jet, but the spray pipe did not fit perfectly the jet and it was remained partially clogged. Mainly this is the only possible cause which justify the symptoms.
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Pretty much. You need to remove the pilot jets, soak them in carb or brake cleaner for a half hour or more and then scrub them out with a piece of stranded copper wire. The wire makes a good brush and won't damage the brass jet.
Use a magnifying glass! You should be able to see the machining lines in the jets from when they were drilled at the factory.
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Have you ever removed the bowl and the jet without removing the carbs ?
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Never. The chance of doing damage to the carbs is a much larger inconvenience than removing them and doing it right.
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The collar is the copper hole for the needle jet. It is viewable when you remove the diaphragm. Is it correct ? I removed the main jet and holder together. Probably the collar was still remain inside the carburetor and I did not noticed it.
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Correct. From the diaphragm side it looks like a brass ring in the carburator throat. It's a light press fit and normally held in by the top end of the emulsion tube, so finger pressure will usually push it out.
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The picture:
http://www.bikebandit.com/houseofmot...m6894sch512877
do not show the holder. I understand that the collar is on the top of the holder (between the holder and the carburetor) it is not inside the holder (between the jet and the holder). Is it correct ?
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Yes, the needle jet sits on top of the main jet holder/emulsion tube and and goes through the carb body into the venturi.
Jim
