Carb Needle Shim?

Information and questions on GL1200 Goldwings (1984-1987)
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Carb Needle Shim?

Post by tom84std » Fri Aug 03, 2012 8:40 pm

My first Wing was a 1000 and I found it to be running a bit lean and sputtering just a little at low RPM. My experience with British bikes and Amal carbs told me I needed to raise the needle to enrichen the mixture over all. Amal carbs have this adjustment built in. The Goldwing carbs did not. I took a set of #4 flat washers and opened the holes to clear the needle shafts and ran them back and forth over a mill file and then some #200 emery paper to remove the drilling burrs and they all averaged about .025" thickness. I installed them under the heads of the needles thereby raising the needles an average of .025". It enrichened the mixture and really seemed to make my bike run much smoother throughout the range. Have any of you guys found this to be effective on the 1200's?

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Re: Carb Needle Shim?

Post by zamboni920 » Sat Aug 04, 2012 9:20 am

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Re: Carb Needle Shim?

Post by virgilmobile » Sat Aug 04, 2012 5:11 pm

Yup,sure did.My 1200 ran lean in the mid range.
All rpm mixture ratios need to be identified so the correct mods are done.
You wouldn't open the low speed jet to change the 2000 rpm range.It would help a little because of the fuel overlap.
My 1500 had a lean condition in the idle to 1500 rpm...that's in the slow circuit.It became one of those "add a little adjust a little"things to get the overall correct mixture throughout the full range.
Here's the post...viewtopic.php?f=5&t=9179

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