Dual Weber carbs on a 1200 maybe - Steve Saunders Goldwing Forums

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post #1 of 18 (permalink) Old 02-15-2019, 04:05 PM Thread Starter
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Dual Weber carbs on a 1200 maybe

Hello, I've looked for a while about this and it seems no one has wanted to put dual carbs on a 1200, or they're just not written about. I have read about putting dual weber idf 40 carbs on 1100s and 1000s. Is there a specific reason why 1200s only seem to have single carb conversions? Thanks in advance.
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post #2 of 18 (permalink) Old 02-15-2019, 05:26 PM
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it has been done,a guy in Apache Junction did one and it was an animal,I don't recall how he did the intake but it ran like a scalded dog.
I was in error,it was 1100 but no reason not to

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post #3 of 18 (permalink) Old 02-15-2019, 05:40 PM
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Properly tuned a 1200 runs really well on the stock carbs.

The expense and work involved for the conversion are pretty substantial if no manifolds exist. Then you have the problem of getting them synced correctly.

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post #4 of 18 (permalink) Old 02-15-2019, 06:37 PM
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You could do it with the intakes Randakk makes for the 1000. Where would you put the carbs unless it's a standard? Probably wouldn't run any better than the stock carbs anyway without some cam & exhaust work.

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post #5 of 18 (permalink) Old 02-15-2019, 08:36 PM Thread Starter
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Thank you for the replies, my issue I'm dealing with is that all I have are 1100 carbs. I have an 84 1200 in an 83 1100 frame. I have everything working and running but the carbs arent working great without rebuilding them and tuning. I am also going to relocate the gas tank to the front of the bike and cut the back off. I know stock carbs will work but I fell in love with the dual carb mod look. The manifolds aren't much of an issue as I can make them. Power isn't too much of a concern as long as it runs good and dont lose any. My question I guess would be is if the Weber 40s would be within tuning specs of the 1200 motor. Also could I set them up like the 1100 and be close to smooth running.
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post #6 of 18 (permalink) Old 02-22-2019, 12:41 AM
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Although using Randakk’s Runners will work, the 1000/1100 had a larger intake runners and ports than the 1200, 1.44” to 1.22” approximately. So the charge would be running into a ledge at the ports of the 1200 head. The mounting bolts are slightly different as well, but can be made to woekf

I think using the smAller runners would be best. They might give up a bit in fifth gear,
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post #7 of 18 (permalink) Old 02-25-2019, 09:02 PM
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This is one of HOTT's builds from a few years back on a 1000, in his case he used Stromberg's, but you get the picture.
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File Type: jpg One of HOTT's builds.jpg (119.2 KB, 27 views)

For what it's worth and if I may be so bold? The current rebuild of the `80, `81, `82 & `83 GL1100STDASPENSTATE can be followed on classicgoldwings.com in a thread called "The plan is to turn 140,000 into 50,000."

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post #8 of 18 (permalink) Old 02-25-2019, 09:50 PM
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Better add that I’m looking at a dual carb setup with a Meanstreak tank on top. The Meanstreak is nice because it fits the wide frame of the Wing. The tank is wide and there is no way dual Weber’s will work as straight downdrafts. They would have to be tilted outwards 10-20 degrees, or the tank would need to be notched to allow fitment. Proper float levels might be an issue.
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post #9 of 18 (permalink) Old 02-25-2019, 09:57 PM
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Here’s where mine will have to go. If this won’t work, plan B
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post #10 of 18 (permalink) Old 02-26-2019, 01:57 AM Thread Starter
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Quote:
Originally Posted by Ekvh1 View Post
Here’s where mine will have to go. If this won’t work, plan B
Thanks for adding to this. Gotta ask now looking. Did you put 1100 heads on a 1200 motor?
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