carb synch adjusters

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carb synch adjusters

Postby Dreaming » Thu Apr 20, 2017 8:16 pm

Good day, I am a little confused by what I have under the seat of my 81 cbx1000, there are 6 valves that attach to the vacuum outlets on the carbs where you would normally hook your carb sticks. The person I bought the bike from has passed away and I am not sure how to operate this cool setup. Does anyone have any knowledge of this setup and how it operates? It looks like it is a easier way to synch the carbs but I have no idea how it works.
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Re: carb synch adjusters

Postby spencer » Thu Apr 20, 2017 9:54 pm

I have never seen this before, but it looks like it is a system of extensions to the vacuum ports on each carburetor. I;m not sure why it was done, except maybe it is easier to get to these ports instead of the ones actually on the carburetors.
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Re: carb synch adjusters

Postby swarrans » Fri Apr 21, 2017 2:03 am

Built by someone who loves to sync their carbs frequently?!

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Re: carb synch adjusters

Postby Mello » Fri Apr 21, 2017 4:19 am

Looks like you would screw the little brass stoppers out and screw your extensions for the gauges into the holes. Seems like a lot of effort for something that is not a regular adjustment.
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Re: carb synch adjusters

Postby daves79x » Fri Apr 21, 2017 7:14 am

And it is a vacuum leak disaster waiting to happen. Vacuum line gets old and cracks very quickly.

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Re: carb synch adjusters

Postby Rick Pope » Fri Apr 21, 2017 7:50 am

Hmmmm. A complex answer to a simple problem? To me, it appears the former owner wanted to sync the carbs using only two gauges. But I agree with Dave, remove it before it causes grief.
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Re: carb synch adjusters

Postby Ringnalda » Sun Apr 23, 2017 8:58 am

In addition, the extra vacuum space may reduce the efficiency of getting fuel to where it matters...
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