S&S Carb issue - please help - The Jockey Journal Board

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Old 04-22-2014, 12:34 PM   #1
hath
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Default S&S Carb issue - please help

The other day I was riding my bike (has a s&s super E carb), I got on it pretty hard (seemed to do fine), but once I slowed down and turned the corner the motor started to die, then it would idle good again, then want to die, and it did this a few times before it finally did die, then some gas came out of the carb. Since then it hasn't ran the same. It seems to foul plugs now (I'm assuming it's because they are getting saturated with fuel), and I can't get it to start. We did pull the carb apart and everything looked to be in good working order, though we did remove the bowl vent screw (as per S&S's recommendation for running aftermarket carb covers, in my case a v-stack). When we put the carb on it ran pretty good for a few seconds, then it died, gas came out of the carb again, and it hasn't fired since. Any suggestions? I was going to replace the plugs and rebuild the carb. Don't know if it matters (probably doesn't for startup, but does while running) I'm running unbaffled drag pipes.
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Old 04-22-2014, 01:04 PM   #2
Elffors
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Default Re: S&S Carb issue - please help

Fuel supply to the carb?
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Old 04-22-2014, 01:13 PM   #3
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Default Re: S&S Carb issue - please help

It's a brand new gas tank, and I've been running 91 octane.
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Old 04-22-2014, 01:28 PM   #4
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Default Re: S&S Carb issue - please help

the flote needle is not shutting off
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Old 04-22-2014, 01:48 PM   #5
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Default Re: S&S Carb issue - please help

But what's keeping it from starting now? I know it's getting fuel, and the plugs have been cleaned.
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Old 04-22-2014, 01:49 PM   #6
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Default Re: S&S Carb issue - please help

Also, when we pulled the carb apart there was a small groove cut into the needling where it would seat. Looks like a good place to start, but it's just weird since it's worked just fine up until now.
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Old 04-22-2014, 02:22 PM   #7
moose49
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Default Re: S&S Carb issue - please help

needle an seat are bad,float set to high?
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Old 04-22-2014, 02:45 PM   #8
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Default Re: S&S Carb issue - please help

Not sure on the adjustment of the float. When I pull it out I'll measure it.
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Old 04-22-2014, 03:21 PM   #9
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Default Re: S&S Carb issue - please help

I ran into problems on a newly setup tank/ fuel system with similar symptons, turned out the cap wasn't vented sufficiently. A ton of pressure would build up in the tank as the gas expanded/ evaporated. Try new plugs and if you get it running open the cap slightly while you ride it around a little.
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Old 04-22-2014, 03:44 PM   #10
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Default Re: S&S Carb issue - please help

Interesting. I'll have to try that.
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Old 04-22-2014, 04:06 PM   #11
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Default Re: S&S Carb issue - please help

maybe try the old tank to see if that helps narrow it down?

…honestly your issues sound electrical to me…I rebuilt my S&S twice (fucked it up the first time) before I figured out I had an ignition switch ground that was loose—would only act up when warm=/
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Old 04-22-2014, 04:17 PM   #12
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Default Re: S&S Carb issue - please help

As i understand it you have fuel spilling out of the carb. If that's the case replace needle and seat and while float is out shake it to ensure no fuel is in it from leaking seam. Install needle and seat then set float level.
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Old 04-23-2014, 03:10 AM   #13
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Default Re: S&S Carb issue - please help

Sounds like the float or there is crap between the seat and needle....
You running a fuel filter.... new tanks have scruff in them too so does the tanks at the petrol station.

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Old 04-23-2014, 04:47 AM   #14
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Default Re: S&S Carb issue - please help

Quote:
Originally Posted by highcomp View Post
As i understand it you have fuel spilling out of the carb. If that's the case replace needle and seat and while float is out shake it to ensure no fuel is in it from leaking seam. Install needle and seat then set float level.

Yep you said it


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