L.D. Wingnut Single Carb Manifold - Steve Saunders Goldwing Forums

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post #1 of 11 (permalink) Old 09-02-2011, 02:44 PM Thread Starter
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Post L.D. Wingnut Single Carb Manifold

Like many, I've tinkered with various single-carb setups on my old wing. I started with a 40mm Keihin CV off of a Harley and later, a Weber DGV progressive 2-barrel. Each had their pros and cons.

I came across LD's web site a couple of years ago and we shared an email exchange or two on the subject. He counseled me not to waste my time and to go with his intake and the round bowl Solex. I searched the forums and found some very favorable reviews of his setup. Everyone seemed to really like it so thought I'd give it a go. Unfortunately, I drug my feet for too long and by the time I was ready to purchase, he'd shut down the business. I know he was convalescing following a medical issue last fall but I assumed he'd resurrect the business later. Several attempts to contact have been unsuccessful.

In early March, I decided to fabricate my own. I constructed mine of 16 gage mild steel exhaust pipe. I created a jig, cut and notched the pipe in my shop, and had it all tig welded up by a local welder/fab shop. Looked like a professionally manufactured product. I purchased an old Solex 30 PICT-1 locally off of Craigslist and rebuilt it. I didn't know anything about these carbs at the time and I got a 47-1 which didn't have the integral return spring and perch. I had to fabricate my own. I jetted it according to L.D.'s advice and proceeded to put ~1,000 miles on it (80 mile/day commute). The throttle shaft of that old carb leaked like a sieve – sloppy loose. Ran fine but had a hard time idling, would stumble when I came to a stop, etc. I considered having it rebushed but decided instead to get a 75-1 which is the same 30 PICT-1 that includes the return spring but no enrichment circuit, idle solenoid, etc.

Sorry folks – I tend to get wordy. I'll cut to the chase. I've now put over 4,000 miles on the new carb and I couldn't possibly be happier. This thing runs like a dream! I get ~40mpg and that's at an average speed of 75mph. It starts quicker than any carbureted vehicle I've ever owned, idles well, and runs like a scalded ape. I've ridden it at every elevation from sea level to ~7,500 feet and no issues.

I've decided to manufacture a short run of these manifolds and see if there's any interest. I'm awaiting bids from my welder and a couple more but I'm aiming for a manifold-only price <= $200. I've found two sources of remanufactured carburetors that sell them for ~$150. EMPI also makes an after-market copy but I've been advised to steer clear of them. I spoke to L.D.'s source (Speed Shop in Harriman, TN) and he's now reselling a Chinese knockoff (not EMPI) that he says seems to perform and hold up well. At this point, I still favor a rebuilt, genuine German Solex.

If anyone is interested, holler.

To anyone who purchased or owns one of LD's intakes, I'd like to ask a couple of questions:
  1. From what material was it constructed? From photos, also looks like steel.
  2. What was the finish (i.e. paint, powder coat, etc)
  3. Do you have any complaints, criticisms, or suggested improvements?


ps. Steve, if this post sounds too much like and advertisement, apologies. Pull it and I'll edit to just solicit info/feedback from those with one of LD's intakes. I'm not going to make a worthwhile profit on the endeavor. I just hope to put the same smile on a few more faces that I'm wearing. ;-) Thanks for an awesome site.
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post #2 of 11 (permalink) Old 09-02-2011, 04:59 PM
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post #3 of 11 (permalink) Old 09-02-2011, 05:24 PM
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Hey Scott,

I would be interested in seeing some pictures if you have them.

As my tag says, I like the idea of a single carb. I too missed the boat on LD setup. I sure hope things are going well for him. It looked like a sweet setup.


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post #4 of 11 (permalink) Old 09-02-2011, 06:34 PM
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Just to let you know, as a long time air cooled VW enthusiast, EMPI went out of business decades ago, and all that is left is the name and logo. It is now a Chinese company, and produces cheap copies of what EMPI used to make. There are still decent sources for these carbs out there, check out some ads in VW magazines, or some online VW parts places.

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post #5 of 11 (permalink) Old 09-02-2011, 07:26 PM Thread Starter
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Hey Jerry, see you too are in Phoenix. Yes, I found three sources on TheSamba. Keith Doncaster built the carb I'm running now and he did a fine job.
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post #6 of 11 (permalink) Old 09-02-2011, 07:48 PM
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I'm guessing your using the single carb on a 1100? I would be interested in it if it works on a 1200.
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post #7 of 11 (permalink) Old 09-03-2011, 10:08 AM
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hmmmmm im going to follow this thread ...i realy have no info to to offer.....im interested in a more reliable setup what got me was the 40 mpg thats totaly aceptable ....

i heard of all kinds of problems with the ld setup from people who have purchased it ...but sometimes i wonder what condition there motors were in in the first place ....there are so many things that mimic carb problems that are not carb problems at all ...mostly weak ignition and totaly hammered top ends from wore out weak springs that are 30 plus yrs old
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post #8 of 11 (permalink) Old 09-13-2011, 03:06 PM Thread Starter
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Sorry folks, slow in responding. Have been on vacation. Back to the old grind stone.


I was in such an all-fired hurry to get mine mounted that I failed to take any pics first. As it's now on my daily driver, I'm reluctant to pull it. Will try to take a couple of pics as it sits installed and post them.


This manifold will fit the 1000 and 1100 only. If I ever find a cheap 1200 (and can sneak it under the radar - I also call her sweetheart), I would think it would be trivial - just different dimensions, fitment, and carb jetting.


Ditto. I read some of the same stuff when researching LD's setup on the forums but most were positive. What I can tell you is that you can't have any loose rust in tank clogging filter or making it past same to plug jets and tiny carb orifices. Have to have a clean tank. Ignition also has to be up to par. Has to be firing well on all 4 cylinders and have to have reasonably good and balanced compression. That said, if someone bolts on a leaky old Craigslist or Ebay find like I did, then they'll be frustrated as it won't idle well. Should still run like a scalded ape at speed but will idle poorly. A properly rebushed and remanufactured carb is too reasonably priced to mess with a junker.

Will hopefully post notice that I have a couple finished and available shortly.

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post #9 of 11 (permalink) Old 09-13-2011, 03:12 PM
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Hey Scott,

Please go to the Members Account link and fill in your profile.

If you are in Phoenix area, we need to find a DQ and set a while.


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post #10 of 11 (permalink) Old 09-13-2011, 03:41 PM Thread Starter
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Ran out to the garage and snapped a couple of pics. Not real clear as I shake but should give you a feel for how it turned out. Also, still had one on the camera - a top-down shot I took of it the day I mounted the new carb.

The U-bolt and modified angle bracket serves as my cable retainer. The new flange design mimicks LD's - extended the tail of the flange to which is welded a shim that allows the pull cable to be attached in a real clean yet secure manner.

You'll note that in my rush to get it mounted and tested, I didn't paint or powder coat this one and it's starting to show a little surface oxidation.

Click on this link to see pics: https://picasaweb.google.com/1119660...1100SingleCarb
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