What is this weird carburetor?

grhanka · 09-07-2021, 07:34 PM

This carb LOOKS like it has an integrated accelerator pump, but it doesn't actually pump any gasoline on twisting the throttle. So, what's the point of all the external tubes and the vacuum cylinder?

Huck369 · 09-08-2021, 07:20 AM

I believe that is a vacuum shut-off valve, only lets fuel thru when the engine is turning and creating vacuum

TxTaoRider · 09-08-2021, 09:07 AM

Some carbs use a thing like that to keep them from popping on deacceleration.

grhanka · 09-08-2021, 02:46 PM

Air shutoff is disappointing. I'd much rather have a vacuum-operated accelerator pump that didn't need a split cable.

09-08-2021, 07:20 AM	#2
Huck369 Join Date: Apr 2008 Location: Somerset, KY Posts: 686	I believe that is a vacuum shut-off valve, only lets fuel thru when the engine is turning and creating vacuum __________________ Huck 2013 Honda NC700X 2013 Moto Guzzi V7 Stone 2016 AJP PR4 2022 Templar X 250 2021 Sondors Metacycle AMA Life Member
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09-08-2021, 09:07 AM	#3
TxTaoRider Join Date: Oct 2020 Location: Flower Mound Texas Posts: 904	Some carbs use a thing like that to keep them from popping on deacceleration. __________________ 2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene"
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09-08-2021, 02:46 PM	#4
grhanka Join Date: Aug 2021 Posts: 58	Thanks for the replies. Air shutoff is disappointing. I'd much rather have a vacuum-operated accelerator pump that didn't need a split cable.
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