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Discussion Starter #1
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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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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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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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...
 

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Discussion Starter #8
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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Discussion Starter #10 (Edited)
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.
 

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Does the Hypercharger butterfly open at all? If not then that would definitely choke out the bike. If they do open, then a logical approach tells us that, if there were a vacuum leak somewhere, the bike would actually run lean, not rich. So it's likely not a vacuum leak. I have no frame of reference to which vacuum line you are using for the hypercharger, but are you certain it's the appropriate line? I am not overlay familiar with the 1300's carb so am not sure if there is a vacuum line, or any line for that matter, that without it, the carb would dump fuel.


Many have disconnected the Hypercharger butterflies as having caused more problems than they are worth, but have never heard of your problem specifically. When I first saw the Hypercharger I thought they were race inspired and kind of flashy. The earlier units were particularly poor performers, performing worse than the stock airbox in most cares. The later ones are much better, but now, to me, they are not to my taste at all.
 

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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.
Don't connect the vacuum hose until you find the problem.

Probably has a diaphragm to operate the butterflies..
Take it apart and look at it.

Hypercharger is "Bling" only according to people that know more than I do.

Give a text description of the vacuum connections beginning at the intake manifold source..
 

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Discussion Starter #13
My last post was.

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
 

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Discussion Starter #14
Here’s the deal tho. If I eliminate the line to the butterflies, it’s the same as hooking it up (meaning plugged). Once I do that, the the bike dies. If I leave it unplugged from the butterflies and just sucking open air, it runs great and no fouling. My idle is set about half way and the A/F screw is 1.75 turns out.
 

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Confusing... Not in a flow that shows connectivity..

Manifold
source ----------tee-------------tee--Petcock
.........................I......................I
.......................carb.................Plug

Does it run????

If it RUNS remove plug and place the HC vacuum hose on it.....

https://screenshots.firefox.com/VGnSkXWt1jdmwO7B/www.vtxoa.com
I saved screenshot.... Text editor did not save spaces...
 

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When you connect the vac line do the butterflies move on the hc? If not how are you getting air? Can you open the butterflies manually or with a vacuum pump and then test again plugging your vac lines etc....
 

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Also is the air filter clean? An excessively dirty or (over oiled) filter can choke out your airflow as well. Sometimes the simple things are overlooked.
 
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