#2 ? Pink hose carb port


Information and questions on GL1500 Goldwings (1988-2000)
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84wing1200a
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Motorcycle: 1996 Honda Goldwing Aspencade

#2 ? Pink hose carb port

Post by 84wing1200a »



96 gl1500 aspy base/left carb port next to carb boot. Pink banded hose.

Does this port provide vacuum or vent. Currently that port is plugged as in I have cleared it out with pick, but unable to push or pull air. It does have a check ball like feature if not mistaken. My question is whether this needs to be cleared all the way through (meaning I will have to micro drill through) or it’s just dummy and nothing is able to be pulled through or push through. I understand this vacuum line t’s and connects to both iat and the valve for the intake chamber that connect to upper breather box. Advice needed. Also anyone have a spare diaphragm and slide they willing to part with.


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ct1500
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Re: #2 ? Pink hose carb port

Post by ct1500 »

84wing1200a wrote: Wed Dec 07, 2022 9:34 pm 96 gl1500 aspy base/left carb port next to carb boot. Pink banded hose.
I understand this vacuum line t’s and connects to both iat and the valve for the intake chamber that connect to upper breather box. Advice needed. Also anyone have a spare diaphragm and slide they willing to part with.
That is a vacuum line which ONLY under a certain temperature provides vacuum to the hot air door of intake air snorkel bringing in heated header pipe air via the zip tube to aid cold start driveability and quicker warm-up times which also aids emissions requirements.
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84wing1200a
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Re: #2 ? Pink hose carb port

Post by 84wing1200a »

CT1500,

Soooo that port provides constant vacuum? Im not following what you were saying as it didnt directly answer my question about the port on the carb. If this port does provide constant vacuum, would it be plausible to just drill out that port to clear any obstructions? my focus is not on the tube itself, thats in place to help reference what I am talking about. I need direct answer on what needs to happen with the carb port. with the prices of used carbs, purchasing another set to study would be a fruitless endeavor.
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WingAdmin
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Re: #2 ? Pink hose carb port

Post by WingAdmin »

That port should supply constant vacuum, yes. The IAT thermal vacuum valve opens and closes which controls the vacuum getting to the IAT vacuum actuator. The pink tube coming out of the left carb and leading to the check valve should have vacuum at all times when the engine is running.

Vacuum diagram
Vacuum diagram

84wing1200a
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Joined: Mon Oct 31, 2022 8:17 am
Location: United States
Motorcycle: 1996 Honda Goldwing Aspencade

Re: #2 ? Pink hose carb port

Post by 84wing1200a »

Thank you WingAdmin, I actually ended up using a small drill bit and drilling out the corrosion within the port.


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