What re these 2 hoses on my vm26carbs?

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28 Jul 2011 01:39 #465451 by pburnhamb
What re these 2 hoses on my vm26carbs? was created by pburnhamb
hey. dont kno much about this bike yet. just got this 76 kz 900 for free. got it fired up tonight after cleaning the carbs out. i am wondring what these 2 hoses are. are they vacuum hose and need to be pluged or are they just vents? there is the 2 fuel lines. the 4 overflow hoses then these 2 mystery hoses facing up that arent capped off. were they for a petcock at one point and there is a different one on the tank now or are they just vents??? tank you for all/ any help.

1978 kz650b (810, 750 head)
1976 kz900
1977 xs650

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  • testarossa
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28 Jul 2011 07:20 #465477 by testarossa
Replied by testarossa on topic What re these 2 hoses on my vm26carbs?
Those are float bowl vents. There would have been a hose attached to each one that ran over the top of the airbox originally. Those hoses are open on the other end. They just keep the float bowls at atmospheric pressure. If they were closed, then a suction would be created in the bowls. Then the fuel would quit flowing.

1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN

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28 Jul 2011 07:24 #465478 by 0Z.Z1R Mk2
Replied by 0Z.Z1R Mk2 on topic What re these 2 hoses on my vm26carbs?
If you mean the ones below?.....I'd be interested to know as well.:unsure:


1976 KH 500 triple
1978 Z1R D1
1980 Z1R MK2
1983 Gpz750 turbo
2007 ZRX 1200r
1982 GSX 1000S Katana
1983 GSX 1000S Katana
Don't knock my turbo lag - it gives your naturally aspirated a chance..

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28 Jul 2011 07:28 #465479 by 0Z.Z1R Mk2
Replied by 0Z.Z1R Mk2 on topic What re these 2 hoses on my vm26carbs?

testarossa wrote: Those are float bowl vents. There would have been a hose attached to each one that ran over the top of the airbox originally. Those hoses are open on the other end. They just keep the float bowls at atmospheric pressure. If they were closed, then a suction would be created in the bowls. Then the fuel would quit flowing.


ARRR so thats what there for...cheers.:)

1976 KH 500 triple
1978 Z1R D1
1980 Z1R MK2
1983 Gpz750 turbo
2007 ZRX 1200r
1982 GSX 1000S Katana
1983 GSX 1000S Katana
Don't knock my turbo lag - it gives your naturally aspirated a chance..

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28 Jul 2011 08:08 #465481 by testarossa
Replied by testarossa on topic What re these 2 hoses on my vm26carbs?

0Z.Z1R Mk2 wrote: If you mean the ones below?.....I'd be interested to know as well.:unsure:


Exactly. Those are the vents.

1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN

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28 Jul 2011 11:52 #465509 by pburnhamb
Replied by pburnhamb on topic What re these 2 hoses on my vm26carbs?
great. thank you. looking forward to a testride today!

1978 kz650b (810, 750 head)
1976 kz900
1977 xs650

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31 Jul 2011 18:33 #466048 by ModularLettuce
Replied by ModularLettuce on topic What re these 2 hoses on my vm26carbs?
Was just about to make a post with the exact same question! Thanks :)

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  • TeK9iNe
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31 Jul 2011 20:18 #466067 by TeK9iNe
Replied by TeK9iNe on topic What re these 2 hoses on my vm26carbs?
:laugh: We see so many questions for these same vents each year, they should have been labeled at the factory!

On the later models, the tubes from those vents attatched to a couple of nipples on the airbox, but same purpose really just allows bowl to continually fill to same level while underway.

B)

Motorcycle Shop Owner/Operator

79 Kawie Z1000 LTD
81 Kawie Z1000 CSR
83 Honda VT750C A
85 Kawie GPZ900 A2
86 Zukie GS1150 EG
93 Yamie XV1100 E
Lucky to have rolled many old bikes through my doors ;)

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