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1981 GS750E Carb Hose Advice Needed

  • Thread starter Thread starter Smurf
  • Start date Start date
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Smurf

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I am restoring a 1981 GS750E. My carbs and petcock are rebuilt and my tank is ready to put back on, but where do all these darned hoses go?

There's a large nipple between carbs 2 and 3 at about the level of the top of the float bowls. Is this the main fuel input? Does this attach to the large nipple on the petcock?

There are also 2 nipples a bit higher up on the carb rack, approximately mid-slide level, one between carbs 1 and 2 and the other between carbs 3 and 4. Are these vents?

Since I'm not using the stock airbox, do I even need hoses here? If so, where should I route them? How long should they be?

There's also a small nipple, even higher up, on carb 2. What is this one for? Is it some kind of vent? Does it attach to the smaller nipple on the petcock?

Finally, there's a nipple on the fuel guage. I have no idea where this one goes!

Many thanks in advance for advice you guys can offer.
 
Smurf said:
There's a large nipple between carbs 2 and 3 at about the level of the top of the float bowls. Is this the main fuel input? Does this attach to the large nipple on the petcock?
Click to expand...

Yep, That's the main fuel inlet and goes to the large nipple on the petcock

There are also 2 nipples a bit higher up on the carb rack, approximately mid-slide level, one between carbs 1 and 2 and the other between carbs 3 and 4. Are these vents?
Click to expand...

Yes

Since I'm not using the stock airbox, do I even need hoses here? If so, where should I route them? How long should they be?
Click to expand...

I don't think so.

There's also a small nipple, even higher up, on carb 2. What is this one for? Is it some kind of vent? Does it attach to the smaller nipple on the petcock?
Click to expand...

That's the petcock vacuum line and connects to the small tube on the petcock. If your petcock doesn't have a vacuum port, then that line must be blocked off.

Finally, there's a nipple on the fuel gauge. I have no idea where this one goes!
Click to expand...

That's a fuel leakage hose in case the gauge?s sending unit starts to leak. Keeps fuel from dumping onto a hot engine. Connect some hose and route the hose to a safe location by the rear swing arm pivot.
 
JTGS850Gl and steveb922,

You guys are the best. Thanks for the answers. I owe a portion of the joy I will receive in riding my bike to your help!
 
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