Sticky or dirty float valve


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tom84std
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Sticky or dirty float valve

Postby tom84std » Thu Feb 07, 2013 8:01 pm



Like a lot of the guys, my bike's been sitting for some weeks untouched. Well the weather's warming in Texas and although the stormy season is just around the corner there's warm afternoons and springlike weather on many days now.
I put in the key and hit the button..Grunt!
Hmm, battery's dead. Strange, it's a name brand and less than a year old. Put it on the charger.
Hit the button..Grunt! Still not spinning. Bad wire? Bad starter?
Long story short, I removed the spark plugs, hit the button and was soaked by a fountain of gasoline.
This is the second time this has happened to me. My 1000 did it many years ago.
Change the oil and ride, hopefully whatever is in there will work through with use.



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dingdong
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Re: Sticky or dirty float valve

Postby dingdong » Fri Feb 08, 2013 7:22 am

Petcock on or off???
Tom

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tom84std
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Re: Sticky or dirty float valve

Postby tom84std » Fri Feb 08, 2013 10:25 am

Thanks a lot Dingdong, I was afraid I'd have to admit that I'd left it on. Still though, should it matter? With a bike that's not a gravity fed system should that matter? Either way, it's off now. When it happened on my 1000 I rebuilt the carbs but they badly needed that anyway. These carbs have been run just enough to keep them cleaned out. I'm hoping whatever was stuck in the float valve won't end up as a problem somewhere else. I make frequent rides to Colorado to visit family. That's about 800 miles one way. That should be enough to flush it clear. The fuel pump and filter are both only about 2000 miles old.

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WingAdmin
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Re: Sticky or dirty float valve

Postby WingAdmin » Sat Feb 09, 2013 10:02 pm

When the fuel tank is full, the top level of the fuel in the tank is higher than the carburetors, so the fuel will in fact gravity feed. If you leave your petcock open, and your fuel tank is full (which it should be for storage), and you have a leaky float valve...well, you just experienced what will happen.

Just remember to turn the petcock off next time, and you should be OK.

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tom84std
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Re: Sticky or dirty float valve

Postby tom84std » Sun Feb 10, 2013 9:17 am

Well, dipping a finger in the drain pan full of oil and smelling revealed what I'd thought would happen. There's a good measure of raw gasoline in the oil. I've left the oil drain plug out now for about 36 hours with the drain hole tilted to it's lowest point in hopes of getting as much of the contaminated oil out. In retrospect I had a thought. In the process of discovering this condition the other night I had cranked the engine with the key in the ON position, handlebar kill switch also in the ON position. Sparkplug caps laying on top of the valve covers. Bike and engine as well as ME covered in raw gasoline spray. There obviously was no spark from one of the caps to ground, but had there been....

Hindsight's 2020.

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redial
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Re: Sticky or dirty float valve

Postby redial » Mon Feb 11, 2013 6:55 am

You will have to change your tag to:

"Boom Boom Tom" :D

You just have to be careful when dealing with things that go bang, especially when you are too comfortable with them.
Len in Kapunda

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bustedwing
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Re: Sticky or dirty float valve

Postby bustedwing » Mon Feb 11, 2013 7:32 pm

More then one person has been injured that way. It only takes one moment of not realizing what can happen to cause a nasty accident. When I was an EMT there were many times we would pull up to an accident with spilled gasoline all over the place and someone strikes a road flare. Just habit for some people, but not good in all situations.


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