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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
Photo by Igor Djokovic, camping above San Juan river, Arizona USA

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Photo by Igor Djokovic,
camping above San Juan river,
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  #1  
Old 17 Sep 2006
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carburator hose routing ? Help!

Hello Everybody, I 'am new to this forum, but I'am glad I found it.
I just purchased a 86 xt 600 and it has some sputtering problems, I suspect the carb needs some cleaning and some work. My question is how are the hoses on the carb to be hooked up? I have a repair manual but those pics are to dark to see proper hose routing. The reason I ask is the hose from the float bowl drain runs to the outlet above it on the main body of the carb. this upper outlet looks like a bowl vent, is it? I disconected it and can't tell any differance, in performance. any pic's or advise would be very helpfull Thanks Robert. I have tryed to attach a photo maybe this will help
the outlet that i'am talking about is above the gas inlet
the bowl drain hose was attached to it. what is it?
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Last edited by outakontroll; 20 Sep 2006 at 01:30.
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Old 20 Sep 2006
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Quote:
Originally Posted by outakontroll
Hello Everybody, I 'am new to this forum, but I'am glad I found it.
I just purchased a 86 xt 600 and it has some sputtering problems, I suspect the carb needs some cleaning and some work. My question is how are the hoses on the carb to be hooked up? I have a repair manual but those pics are to dark to see proper hose routing. The reason I ask is the hose from the float bowl drain runs to the outlet above it on the main body of the carb. this upper outlet looks like a bowl vent, is it? I disconected it and can't tell any differance, in performance. any pic's or advise would be very helpfull Thanks Robert. I have tryed to attach a photo maybe this will help
the outlet that i'am talking about is above the gas inlet
the bowl drain hose was attached to it. what is it?

Its hard to work out what you mean here. Drains can just be left hanging whereever, same with breathers (but higher is better).
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Old 20 Sep 2006
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Originally Posted by tedmagnum
Its hard to work out what you mean here. Drains can just be left hanging whereever, same with breathers (but higher is better).

thanks for the responce, I thought everybody was Dead.
I know the bottom one is a float bowl drain and that hose should just hang. am I wright or wrong? the question is what is the top nipple for? does anybody know ? the reason I ask is the the drain line was hooked to the top nipple, this looked very wrong to Me. is it a breather? or it a portal to another demention?
thank you, Robert
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Old 20 Sep 2006
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Well what does the manual say ?? Is you have the clymer etc, it should say what it goes too.

Could just be a breather or maybe a take off point for a balancer (is it twin carb) ?

And yes, the float boal drain should not be attatched to it (if thats what you meant)
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  #5  
Old 21 Sep 2006
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I have a yamaha factory shop manual the pics are so dark that I cant see the hose routing, and yes it's a dual carb. I was hoping some one could look at their xt and see if a hose connects to the top outlet, does it just hang or maybee conect to the air box or what?
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Old 22 Sep 2006
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Float bowl vent

Outakontroll, this connection above the petrol connection is indeed one of the flot bowl vents. Normally, there's a hose there that hangs loose downwards. It should not be connected to the bowl drain.
However, there is another vent for the bowl, between the two carbs, so it will probably not solve your problem.

From my experience, these carbs / engines are very sensitive to clogged air filters. Wash 3x in petrol, both the outside and inside filters, and lightly oil them.
Then try again.

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Old 22 Sep 2006
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Try looking at your needle and seat position

Hi there mate my bike also spluttered a bit and throught a long process we have discovered that it is the needle and seat position. iI dont now if this will help you but mave a look anyway, its never a bad thing.

Good luck!

Chris
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Old 26 Sep 2006
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Hey, thanks Wingnut & Aukeboss.
I plan on working on it this weekend,and maybee your advise will save me some serious cussing and time. Robert.
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Old 5 Feb 2024
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Photo of hoses
https://drive.google.com/file/d/1X_7...w?usp=drivesdk
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