What re these 2 hoses on my vm26carbs?

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.

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.

If you mean the ones below?.....I'd be interested to know as well.

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.

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

Exactly. Those are the vents.

great. thank you. looking forward to a testride today!

Was just about to make a post with the exact same question! Thanks

: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.