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YB 10 Fuel lines question
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Tirefriar



Joined: 18 Dec 2014
Posts: 659
Location: USA

PostPosted: Thu Feb 25, 2016 3:40 pm    Post subject: Reply with quote

Gentlemen, thank you so much for the wealth of information. Here's what I'm thinking - I will check the breather hoses once again because after I plugged them into the small plastic tube retainer (I will take the picture once I'm there again) the leaking stopped. The culprit originally was the left hose.

If indeed it is still leaking, I will try to tap on the carbs in hopes of dislodging any spec of dirt there. If that doesn't work, it will need to have a specialist to be looked at. I am also installing a fuel filter (or filters) at the same time.

Jonny, your configuration with the breather hoses ou dos very interesting. Please post a picture or two when you get a chance.
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Joined: 22 Oct 2007
Posts: 508
Location: Stafford, UK

PostPosted: Mon Feb 29, 2016 9:17 pm    Post subject: Reply with quote

Hi

On mine the breathers (one between carbs 1& 2, the other between 3 & 4) go forward into a small plastic canister, and then from there another pair of hoses run forward into the airbox intake area of the frame behind the head stock.

You can see here:-



Al the best

Katy
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Tirefriar



Joined: 18 Dec 2014
Posts: 659
Location: USA

PostPosted: Tue Mar 01, 2016 6:16 am    Post subject: Reply with quote

Thanks for the pick. Did you have to drill the openings in the frame? I don't see a breather tube to the air box.
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Jonny B Bad



Joined: 05 Dec 2009
Posts: 555
Location: NE London

PostPosted: Tue Mar 01, 2016 9:43 pm    Post subject: YB10 carb breathers Reply with quote

Those are the under slide breathers. You should also have a pair like that George, but you're talking about the float bowl breathers. I'll try and get a picture of mine up when I get back to the UK. But this picture does illustrate my point that these breathers are vented to the chamber from which the carbs take their air, via the air filter.
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Jonny B Bad



Joined: 05 Dec 2009
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Location: NE London

PostPosted: Tue Mar 01, 2016 9:48 pm    Post subject: YB10 carb breathers Reply with quote

The float bowl breathers are the hoses that come off the two white nylon tee pieces which you can see sitting under the tee pieces for the under slide breathers in the picture.
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Tirefriar



Joined: 18 Dec 2014
Posts: 659
Location: USA

PostPosted: Tue Mar 01, 2016 10:19 pm    Post subject: Reply with quote

You are right. The one leaking on mine was a float bowl breather on the left side (in the picture).



I unplugged it from the black "breather" bolted to the side of the block (hard to see in the picture) to see if it still leaked, but it didn't. Problem solved, for now. My next step is to add fuel filters to avoid the problem in the future
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2001 MV F4
2003 Aprilia RSV Mille CE Replica
2004 BMW R11S BCR
2010 Ducati Streetfighter 1098 S
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Tirefriar



Joined: 18 Dec 2014
Posts: 659
Location: USA

PostPosted: Tue Mar 01, 2016 10:19 pm    Post subject: Reply with quote

You are right. The one leaking on mine was a float bowl breather on the left side (in the picture).



I unplugged it from the black "breather" bolted to the side of the block (hard to see in the picture) to see if it still leaked, but it didn't. Problem solved, for now. My next step is to add fuel filters to avoid the problem in the future
_________________
1991 Bimota YB10
2001 MV F4
2003 Aprilia RSV Mille CE Replica
2004 BMW R11S BCR
2010 Ducati Streetfighter 1098 S
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