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YB8 fuel tap logic

 
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Bud977



Joined: 03 Mar 2013
Posts: 525
Location: Sydney

PostPosted: Thu Mar 27, 2014 4:21 am    Post subject: YB8 fuel tap logic Reply with quote

Is there any logic to the YB8 fuel tap system?



The left hand outlet is like a reserve as it is low level, yet can't be turned on/off.

The right hand outlet has an off/on/off tap and a higher inlet. There is no reserve setting.

It would be good to be able to shut off the fuel to remove the tank. I am thinking of removing the left hand outlet and having a single outlet through the tap. I could remove the extension pipe on the inlet to remove the "reserve" capability.

The single outlet flows enough fuel by itself as I have been running the fuel level low during races and hence it has only been using the left hand outlet. And boy does it use some fuel!
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brian



Joined: 22 Aug 2011
Posts: 3769
Location: Australia

PostPosted: Thu Mar 27, 2014 6:47 am    Post subject: Reply with quote

I'm not familiar with the yb8 tank, but is it shaped in such a way that fuel will be trapped in the left hand side unless there's an outlet there?

You could use one of these on your main fuel line -

http://www.ebay.com.au/itm/171076279122?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2648
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brian



Joined: 22 Aug 2011
Posts: 3769
Location: Australia

PostPosted: Thu Mar 27, 2014 6:50 am    Post subject: Reply with quote

I bought one to fit to the track bike i'm building and it looks very good quality. Haven't fitted it yet though.
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crankcase



Joined: 09 Nov 2011
Posts: 387
Location: Frankfurt Germany

PostPosted: Thu Mar 27, 2014 8:43 am    Post subject: Reply with quote

could it be that somebody has removed an electric reserve solenoid?
That doesn't look like a Bimota hex bolt in there.
They might have had trouble and taken it off ?
Ian
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laminator



Joined: 27 Oct 2007
Posts: 320
Location: Midlands

PostPosted: Thu Mar 27, 2014 9:53 am    Post subject: Reply with quote

crankcase wrote:
could it be that somebody has removed an electric reserve solenoid?
That doesn't look like a Bimota hex bolt in there.
They might have had trouble and taken it off ?
Ian


This was my thought.

The reserve tube (shorter one) should have a solenoid attached to the bottom, that is energised by the red button on the dash panel.
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Jonny B Bad



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

PostPosted: Thu Mar 27, 2014 11:37 am    Post subject: YB8 reserve fuel tap Reply with quote

Solenoid is indeed missing and when fitted would allow you to remove the tank, once the manually activated tap is turned off, without ruining another pair of shoes Laughing If you're not bothered about a reserve, you might want to take the spigot from what should be the electric tap off and bolt a blanking plate and O-ring over the resultant hole in the tank. By the way, that's the original fuel hose and has probably gone pretty hard by now. If you replace it, try to replicate the original hose layout as closely as possible, as it's very easy to end up with fuel starvation from hoses bending in the intense heat under the tank.
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Bud977



Joined: 03 Mar 2013
Posts: 525
Location: Sydney

PostPosted: Thu Mar 27, 2014 9:05 pm    Post subject: Reply with quote

Good comments everyone. I use the quick couplers on my TZ350 and they're great.

The YB8 tank is relatively flat so fuel doesn't get trapped on one side.

That bolt is not a stock Bimota part so it makes sense that was where the solenoid went. That bolt is an ugly normal bolt, not your typical machined from billet Bimota beauty.

Good point about routing the fuel lines. I'll fit the blanking plate and run a single line.
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