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Super E Carb hassles

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Kev UK

Posts: 168

Joined: Mon Apr 10, 2006 1:46 pm

Location: Carmarthen, Wales, UK

Post Mon Apr 14, 2014 3:40 am

Super E Carb hassles


I'm posting this on behalf of a good friend in Australia, hoping the collective knowledge can offer a solution; here it is in his own words. He has posted a video on You-tube describing the issue so feel free to comment on there if you wish, otherwise I'll give him the link to here.


"My S&S Super E carb has performed flawlessly for several years, kickstart only, with one issue. I replaced the throttle shaft and plate about 5yrs ago as part of a general overhaul of a tired carb, and ever since I CANNOT get the throttle plate to to return to its fully closed position *IF* the accelerator pump screw is even slightly ''on''.

So I have had the accelerator pump switched OFF. No squirt of fuel when I twist the throttle ... But the alternative is a high and erratic idle because the accelerator pump is ON thus the throttle plate does not shut.

I have lived with it, but now it bugs me and I want to sort it so I do have a working accelerator pump at the same time as a perfectly closing throttle butterfly.

I have cleaned the carb thoroughly (you can see how gunky it has become in 5yrs by looking at the throttle shaft along the plate, I will get a cotton bud into there to finish the job)..... checked the little balls and spring in the accelerator pump housing, the shaft and rubber boot are clean......what gives?

Any solutions welcomed. At this stage I feel like I will buy and install an accel pump rebuild kit, at least....

There is no issue with throttle cable adjustment, trust me. I have adjusted it 56 ways through Sunday....."

Thanks in anticipation for your help

72 Ironhead, goes better than it stops!


2005 XL1200R.... well ya gotta have a rat-bike!


Site Admin

Posts: 4671

Joined: Sun Mar 12, 2000 1:01 am

Location: Ohio USA

Post Mon Apr 14, 2014 8:05 am

Re: Super E Carb hassles

Intake manifold leak ???

Lee W

Posts: 138

Joined: Sat Sep 23, 2006 8:58 pm

Location: Carver, MN

Post Wed Apr 16, 2014 2:56 pm

Re: Super E Carb hassles

I can't help but think that something in the accelerator pump mechanism (on the throttle shaft) is assembled incorrectly. To clarify, the " accelerator pump screw" as you refer to it, adjusts the stroke of the pump - it actually provides a stop for the pump rod movement. To disable the pump, you turn the screw all the way in. No where in the range of adjustment of this screw should it in any way effect the throttle plate's ability to close. Any chance the throttle plate is installed backwards? Could the spring on that end of the shaft be hooked incorrectly? I am not sure that either of these scenarios are even possible, but that is where I would start looking.

Pa, I suppose that what you suggest may be possible, but it would seem to me that disabling an accelerator pump would not mask an air leak. In fact, one would normally expect just the opposite.

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