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Old 06-22-2010, 11:46 AM   #1 (permalink)
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Vacuum lines

I'm trying to help a friend of mine fix his 400 AT that someone trashed. Under the seat we found some vacuum lines that were disconnected, in total there are four of them. Two of them run from the front and rear differential, the other two run from both sides of the carb. I posted a pic with green arrows pointing to the ones from the differentials and blue arrows pointing at the ones running out of the carb.

Does anyone know where and how these lines are supposed to be connected?
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Old 06-22-2010, 12:59 PM   #2 (permalink)
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Are you sure they are vacuum lines? They could just be breather lines/ overflow/ vent...
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Old 06-22-2010, 06:05 PM   #3 (permalink)
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To be honest i don't know. They look like vacuum lines to me. We are still waiting on the manual for it. Was just hoping someone could shed some light on it for me.
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Old 06-22-2010, 06:30 PM   #4 (permalink)
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I believe they're just vent lines.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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Old 06-22-2010, 06:36 PM   #5 (permalink)
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so they are aren't supposed to tie into any T valves or anything?

By the way I do know there is a seperate overflow tube running under the carb, but that isn't one of the ones I'm talking about

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Old 06-22-2010, 06:57 PM   #6 (permalink)
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Quote:
Originally Posted by Redfish View Post
so they are aren't supposed to tie into any T valves or anything?

By the way I do know there is a seperate overflow tube running under the carb, but that isn't one of the ones I'm talking about
I just went and looked at a 350 Rancher out in my garage and the only difference that I see in the lines on it and the lines in your picture, is that the two carb vent lines are run into a tee and exit as one line. It's actually not tee shaped, it's y shaped. The line then runs along the frame rail up under the gas tank.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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Old 06-22-2010, 07:00 PM   #7 (permalink)
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Thanks Helmut. You seem to know your stuff and I appreciate your help
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Old 06-22-2010, 07:00 PM   #8 (permalink)
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Just vent tubes foe the carb need to be routed up high to stay out of the water when crossing deep holes.
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Old 06-22-2010, 07:09 PM   #9 (permalink)
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Quote:
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Thanks Helmut. You seem to know your stuff and I appreciate your help
You're welcome, glad to help.
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Most 4-wheeler problems are caused by a loose nut connecting the handlebars and the seat!!

You only need two tools in life -- WD-40 and duct tape. If it doesn't move and should, use the WD-40. If it shouldn't move and does, use the duct tape.
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