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Author Topic: 78 cb550k carb lines  (Read 720 times)

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Offline pablo78cb550

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78 cb550k carb lines
« on: July 22, 2007, 12:40:28 PM »
so i noticed there are two lines going into the carb. one is the 1/4 inch for the fuel line, and another that is maybe 1/8 inch. what is that? a vacume line? ???
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Offline Jonesy

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Re: 78 cb550k carb lines
« Reply #1 on: July 22, 2007, 01:08:23 PM »
The smaller one is a bowl vent. It just goes to the open air.
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"Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles; it makes me take another look." -Steve McQueen

Offline pablo78cb550

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Re: 78 cb550k carb lines
« Reply #2 on: July 22, 2007, 01:11:45 PM »
should i run a line from it some where? to avoid dirt.
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Bikes in hand:
1977 Yamaha XS650
1978 Yamaha SR500 #119!
1978 Yamaha XS400
1978 Honda CB550K
1965 Ducati Monza 250

Sold off:
1992 Yamaha FZR600
1978 Yamaha SR500- I miss it so much.
1981 Yamaha Seca 550

Offline Jonesy

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Re: 78 cb550k carb lines
« Reply #3 on: July 22, 2007, 01:24:08 PM »
The line usually just goes from the carbs up to the frame, where it is then looped back down near the swingarm.
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"Every time I start thinking the world is all bad, then I start seeing people out there having a good time on motorcycles; it makes me take another look." -Steve McQueen
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