Hi all! New to the forum - anyone know anything about XV250s

[Filby 64]

Hi all!
Just re-found BCF after a good few years away. Good to see it is still alive and kicking.
I'm looking for a bit of help if possible: I have a little Yamaha XV250 - bought as something to tinker with over the winter. I've sorted most of the problems out but am stuck with trying to find out where a rubber hose from the carb connects to: it must go to something...but I cant work out what. There are no unused stubs on the fuel tank, air box etc... I'm perplexed! It appears to be some sort of breather from the float bowl. I've attached an image for reference.

Any input much appreciated!
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Retired automotive engineer, Birmingham born and bred, now hiding in deepest darkest West Wales

[Easy-X]

Well I was going to suggest this:

https://www.cmsnl.com/yamaha-xv250-1992-3ls2-europe-223ls-300e1_model37752/partslist/0010.html

But No.26 is just listed as "pipe"

It looks more like Keihin than Mikuni style. If so it'll probably just be the float bowl overflow. That would mean a longish pipe pointing down at the ground. Have you maybe got some pipes mixed up?
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[jaffa90]

As mentioned it does look like a float bowl overflow outlet.

[Filby 64]

Hi both
Thanks for the replies. As regards mixed up pipes, there's only the feed pipe from the fuel pump and this hose actually connected to the carb - and the feed hose is also a specific shape that won't allow it to be connected elsewhere. I assume that the homeless pipe is simply some sort of overflow - that's why I'm puzzled as to it having the moulded shaped end and the clip...normally, as you say - they just hang down the frame. I'm puzzled!
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Retired automotive engineer, Birmingham born and bred, now hiding in deepest darkest West Wales

[WD Forte]

Just seen a pic of the carbs innards and despite my first impressions
it does look like an overflow and the pipe runs back down the frame not up in the air
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bikers smell of wee

[Pete.]

It's well above the float bowl so it's probably a breather for that. It was connected to something, perhaps a tee piece with two more similar pipes. Many bikes have this arrangement to stop it setting up a syphon if the bike happens to go over on it's side then get stood up again.

EDIT: Doing an images search of the part number brings up this sketch someone has made. I think it's the one he's labelled "vacuum line to air filter", which would make some sense for a float bowl vent.:

https://virago250street.wordpress.com/2012/05/12/a-plastic-atv-gas-tank-on-a-virago-250-how-bad-would-it-look/virago-250-fuel-and-vacuum-line-routing/

Further edit: Pipe is shown here, but frustratingly just out of shot is where it's fixed to.

https://virago250street.files.wordpress.com/2012/05/with-gas-tank-raised-up-there-is-more-room-you-can-polish-the-carb-now.jpg

https://virago250street.files.wordpress.com/2012/05/xv250-w-plastic-gas-tank-once-you-get-past-the-looks-there-are-several-benefits-opens-up-area-below-tank-easier-to-adj-carb-valves-3-lbs-less-weight-more.jpg[/img]
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[jaffa90]

Never seen a carb fitted on its side before so i`ll pass on this one.

[Filby 64]