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Author Topic: Vacuum line on the carbs? '78 550K  (Read 623 times)

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jbswearingen

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Vacuum line on the carbs? '78 550K
« on: May 24, 2008, 08:06:45 PM »
Okay, so there's what appears (to me) to be a vacuum line coming off a nipple on this bank of carbs.  Or maybe it's an vent line.

My GT380 has a vacuum line that hooks to the the petcock, but this CB only has one nipple coming off the petcock.

Can somebody tell me where to direct this hose that's sticking off?
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Offline OldSchool_IsCool

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Re: Vacuum line on the carbs? '78 550K
« Reply #1 on: May 24, 2008, 08:17:48 PM »
No vacuum lines on this vintage of CB.  The fuel is gravity fed.  Some carb racks are set up for a petcock with a single output tube, some for dual tube, but they are output, not vacuum.
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Offline TwoTired

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Re: Vacuum line on the carbs? '78 550K
« Reply #2 on: May 25, 2008, 12:23:31 AM »
The larger diameter tube is the fuel line.  The smaller diameter line is a bowl vent.  It routes back and down between swing arm pivot and the motor case.

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jbswearingen

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Re: Vacuum line on the carbs? '78 550K
« Reply #3 on: May 25, 2008, 12:58:33 AM »
I figured as much TT, but just wanted to be sure.  It's a small ID tube, about 3/16" or so.

Thanks!
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