Fouling plugs in minutes - VTXOA
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post #1 of 17 (permalink) Old 05-09-2019, 11:00 PM Thread Starter
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Fouling plugs in minutes

Ok, I have an issue with my bike fouling plugs only minutes after replacing. I know it’s running to rich, but how to fix it is another matter. I have Cobra pipes, hypercharger and jet kit. I tried screwing the fuel/air screw all the way in, then out 2.5 turns. Still black plugs. While running I screwed it all the way in. Shouldn’t this kill the bike? Nothing happens.
Also, what is a good idle setting? Is there a trick? Like all the way in an X turns out?
The bike sound bad on the idle. Black puffs out of the pipes (another sign it’s to rich).
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post #2 of 17 (permalink) Old 05-10-2019, 06:24 AM
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Cool

How long are you leaving the coke on?
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post #3 of 17 (permalink) Old 05-10-2019, 07:35 AM
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If the A/F screw is not making a difference than is is plugged/dirty......Also sounds like you may have jetted to high.
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post #4 of 17 (permalink) Old 05-10-2019, 08:46 AM
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you have a REAL carb problem....

not a tuning issue..

disassemble and check things over...

even a Jet falling out of its threaded hole..
float stuck... etc.


even the fuel enrichener being open. adjustment or failure.



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post #5 of 17 (permalink) Old 05-10-2019, 09:32 AM
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Mr VTX has a great Step-by-Step for 1300 Carb Cleaning.

I'm gonna hit the highway like a battering ram,
on a silver-black PHANTOM bike!

Meatloaf~Bat Out Of Hell

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post #6 of 17 (permalink) Old 05-10-2019, 01:56 PM Thread Starter
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Choke won’t stay out. Sucks back in.
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post #7 of 17 (permalink) Old 05-10-2019, 05:49 PM
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Quote:
Originally Posted by MrGoyle View Post
Choke won’t stay out. Sucks back in.
It is spring loaded to close itself.
You can adjust the tension to slow down the closure.
Under the rubber cover by the knob is a nut you hand tighten.
There should be about 3/32" showing of the shaft behind the knob.
Vigorous closing of the knob forced mine to bump the 90° rubber fitting off some at the enricher valve
I restored it back to normal in a few days. Never happened again since I use less push to close the valve.
It is officially a "Starter Enrichment" valve that gives it more air and fuel.
It does a poor transition to idle(engine will kill) so I do 1/4 to 1/2 mile beclosing my SE.
My poor old SE valve...
Attached Images
File Type: jpg Keihin starter enrichment valve.jpg (1.38 MB, 10 views)

2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles

Last edited by Hans&Feet; 05-10-2019 at 05:58 PM.
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post #8 of 17 (permalink) Old 05-12-2019, 05:20 PM Thread Starter
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Ok, so the carb is pristine now and the bike idels perfect, BUT the moment I hook up the hypercharger butterflies vacuum line, it dies and fouls the plugs.
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post #9 of 17 (permalink) Old 05-12-2019, 08:09 PM
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Are you tying into the crankcase vent hose possibly??
Investigate carefully...

2005 1300c Red, Mustang seat, HK 2.5 straights. Leds for safety-front & back. 190,260 VTX miles
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post #10 of 17 (permalink) Old 05-13-2019, 09:15 AM Thread Starter
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No, it is capped off. I put in a “T” on the same vacuum line that goes to the carb for the butter flies. Makes no sense. If I hadn’t put the T in, then it shouldn’t have ran. But with that open line sucking, it runs great.

Line runs from manifold to shut off,
A T to Pair valve
A T to carb.

I placed another T right behind the carb line for the charger
If I leave it open just sucking air it runs great. As soon as I plug it, the bike dies.

Last edited by MrGoyle; 05-13-2019 at 12:38 PM.
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