Can someone Explain what these hoses do?

[sparkywilliam...]

I know they are to do with overflow but why three ?
and do they just hang down between the shock and swingarm?

Thanks
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Previously CG125,YBR125 Now GSF600 Bandit

[The Artist]

carb breather, crankcase breather, fuel tank breather.

Yes they do.

[weasley]

There are various drain tubes that show up on bikes. From the fuel tank filler, the battery, airboxes and anywhere a fluid might collect that isn't wanted or needed. A manual will usually show the proper routing for them; I have 4 on my bike and they appear at the side of the lower fairing, behind the rear brake lever. They need to be kept unblocked and without kinks.
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Yamaha XJ600 | Yamaha YZF600R Thundercat | KTM 990 SMT | BMW F900XR TE

[Pete.]

Could be any of:

Tank breather
Battery breather
Tank overflow
Carb overflow
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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

[sparkywilliam...]

cheers all.
I just couldn't work out why one of the breather cables splits into two (using a three way splitter piece of plastic tubing) and so i thought that's either a bit of a pointless design or am i missing something?
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Previously CG125,YBR125 Now GSF600 Bandit

[Noxious89123]

Got any better pics showing where the offending 3 way hose is attached to the bike?
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'06 Honda CBR125RW-6 ~ '00 Honda CBR600F-Y ~ '07 Honda CBR600RR-7 ~ Bikeless
'53 Ford Ka 1.3 ~ '03 Vauxhall Astra SRi 1.8 ~ '52 Vauxhall Astra SRi 2.2 ~ '53 Vauxhall Astra GSi

[finpos]

I think(!) The fat hose is connected to the crankcase breather - either straight off the engine or from the airbox (I seem to remember it being the second but it looks far too long). The thin hose with the division in it - short length goes to the carbs, long bit dangles out the bottom of the bike.

That's from memory of ripping someone else's bike apart from 5 years ago so don't shoot me etc.

Edit - actually that can't be right. Blow up the fat hose and see where the air comes out, it's probably the filler recess drain.

f.