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Message started by Mattdw on 08/25/08 at 21:54:18

Title: 'Mystery' hoses on carburetor
Post by Mattdw on 08/25/08 at 21:54:18

While removing my carburetor I noticed 2 'mystery' hoses on the back side of the carb (side toward the rear of the cycle). Neither was connected to anything so I'm assuming they are breather hoses?
The weird thing is that the end of one of them was flared, as if it was at one time connected to a fitting somewhere, but is no longer.

Any observations or info would be greatly appreciated.

Title: Re: 'Mystery' hoses on carburetor
Post by verslagen1 on 08/25/08 at 22:37:00

Those 2 hoses (symmetrical about the centerline) are bowl vent tubes.

Usually they're routed up into the opening in the frame just above the carb. I suppose, if your bike flipped over, the gas would run up into the frame instead of up your nose.

Read Savage Wahine's wonderful carb cleaning post, things will become less mysterious.

Title: Re: 'Mystery' hoses on carburetor
Post by skrapiron on 08/26/08 at 05:40:58

They're there to relieve vapor pressure caused by gas evaporating from the float bowl. Not so mysterious afterall.

Title: Re: 'Mystery' hoses on carburetor
Post by Mattdw on 08/26/08 at 07:52:54

53405756494442404B14250 wrote:

Those 2 hoses (symmetrical about the centerline) are bowl vent tubes.

Kinda what I figured, I was just confused because the end of one of them was flared.

Title: Re: 'Mystery' hoses on carburetor
Post by photojoe on 08/26/08 at 07:57:06

I came across one when I broke down, didn't know what it was for. Looked for where it may have been attached, but saw nothing.
Looked at a few carb diagrams, the only reference I saw was the California model had a hose to nowhere. Now we know.