SOLVED: Mikuni TMX Clogged Pilot Passage

sdhuskyrider
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sdhuskyrider
Edited Date/Time 12/4/2019 4:42am
Does anyone know where this angled passage drilled into the venturi goes? I'm trying to clean this carb out and I don't how to test for a blockage becuase I don't know what circuit it feeds.

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sdhuskyrider
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sdhuskyrider 11/29/2019 7:53am
11/29/2019 7:53am
Paul_Pitzonka wrote:
Pilot jet
Thats what I figured and was afraid of. There must be a pinhole there that I can't see becuase of the varnish.
digger
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digger 11/29/2019 8:11am
11/29/2019 8:11am
Paul_Pitzonka wrote:
Pilot jet
Agree, Pilot circuit
Paul_Pitzonka
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Paul_Pitzonka 11/29/2019 10:07am
11/29/2019 10:07am
Paul_Pitzonka wrote:
Pilot jet
sdhuskyrider wrote:
Thats what I figured and was afraid of. There must be a pinhole there that I can't see becuase of the varnish.
Depends how plugged it is but ultrasonic cleaners work great for clearing out passages

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camstop22
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camstop22 11/29/2019 1:19pm
11/29/2019 1:19pm
Use a single strand from a wire brush and try to clear it .remove pilot jet and put the straw from a can of carb cleaner in its hole, it should spray out that hole in front of the slide.
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sdhuskyrider
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sdhuskyrider 11/29/2019 2:47pm
11/29/2019 2:47pm Edited Date/Time 11/29/2019 5:55pm
camstop22 wrote:
Use a single strand from a wire brush and try to clear it .remove pilot jet and put the straw from a can of carb cleaner...
Use a single strand from a wire brush and try to clear it .remove pilot jet and put the straw from a can of carb cleaner in its hole, it should spray out that hole in front of the slide.
I ended up having to dip the carb in Berryman Chem Dip and clearing the passage with a welding tip cleaner. The Chem Dip softened it up and the tip cleaner was just barely strong enough to clear the blockage.
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sandman768
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sandman768 12/2/2019 3:50pm
12/2/2019 3:50pm
sdhuskyrider wrote:
I ended up having to dip the carb in Berryman Chem Dip and clearing the passage with a welding tip cleaner. The Chem Dip softened it...
I ended up having to dip the carb in Berryman Chem Dip and clearing the passage with a welding tip cleaner. The Chem Dip softened it up and the tip cleaner was just barely strong enough to clear the blockage.
I chem dip all my carbs on my old bike builds...
H4L
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H4L 12/4/2019 4:42am
12/4/2019 4:42am
sdhuskyrider wrote:
I ended up having to dip the carb in Berryman Chem Dip and clearing the passage with a welding tip cleaner. The Chem Dip softened it...
I ended up having to dip the carb in Berryman Chem Dip and clearing the passage with a welding tip cleaner. The Chem Dip softened it up and the tip cleaner was just barely strong enough to clear the blockage.
Yes, good stuff. Been using it since the 80’s with excellent results.

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