fuel coming out vent hoses when petcock switched to reserve

[bluespark]

I just pressure washed my bike ( I know, I know), got home and fired it up to burn up any h20 that got in the pipe. I rode around the neighborhood for a 1/4 mile or so and the bike died and wouldnt start again. It would turn over but not fire.
I got it home and thought maybe I was low on gas so I switched it to reserve. Thats when gas started coming out the bottom float bowl vent hose, and also one of the top vents/hose.
I can hear the slide move when I twist the throttle. Any thoughts before I dig into the carb?

 

[gasgasman]

Trash in the float needle.

 

[memphis2857]

Yep float is stuck. It drained all your gas when you weren't looking and then when you switched to reserve it continued to drain your gas.


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[bluespark]

I had just put in a new float needle before the weekend of riding. Maybe 8 hours of ride time.

It kind of seems like the slide is stuck though. I held a 12 oz jar under the vent hoses and let it fill up while it was on reserve. Fuel coming out the bottom and top vent lines.

I just put in more gas and with the petcock "on" it's just coming from the float bowl vent.

 

[bluespark]

Oh ok, I get it now. I had my carb theory a little cornfused. I'll dig into it tomorrow. Thanks!

 

[pscook]

I had just put in a new float needle before the weekend of riding. Maybe 8 hours of ride time.

It kind of seems like the slide is stuck though. I held a 12 oz jar under the vent hoses and let it fill up while it was on reserve. Fuel coming out the bottom and top vent lines.

I just put in more gas and with the petcock "on" it's just coming from the float bowl vent.

Slide is completely independent from the fuel overflow. The fuel is overflowing from the float bowl through the vent tubes because the float needle is sticking open. It's not an indicator of a worn float needle, just that it's stuck.

Give the body of the carb a couple if decent whacks with the handle of a screwdriver, that should knock the needle back into place. Also, shut off the gas before the fuel starts draining into the cylinder (too late). Pull the spark plug, kick it over a couple of times to clear the cylinder, reinstall the plug and have a go at the starter. All with the gas turned off. once it's running turn the fuel tap on and check that it isn't still overflowing; if it is, give it another couple of whacks with the screwdriver. If that doesn't work, time to pull the bowl and look at the float needle.

 

[bluespark]

Anyone know when (in gallons/litres) a stock 11' tank hits reserve? I rode 60 something miles of fast/slow singletrack on a full tank and it was for sure pretty drained when it quit on me tonight.

 

[bluespark]

Slide is completely independent from the fuel overflow. The fuel is overflowing from the float bowl through the vent tubes because the float needle is sticking open. It's not an indicator of a worn float needle, just that it's stuck.

Give the body of the carb a couple if decent whacks with the handle of a screwdriver, that should knock the needle back into place. Also, shut off the gas before the fuel starts draining into the cylinder (too late). Pull the spark plug, kick it over a couple of times to clear the cylinder, reinstall the plug and have a go at the starter. All with the gas turned off. once it's running turn the fuel tap on and check that it isn't still overflowing; if it is, give it another couple of whacks with the screwdriver. If that doesn't work, time to pull the bowl and look at the float needle.

Sounds good, Thanks

 

[swazi_matt]

Anyone know when (in gallons/litres) a stock 11' tank hits reserve? I rode 60 something miles of fast/slow singletrack on a full tank and it was for sure pretty drained when it quit on me tonight.

reserve is about 1 litre. 60miles sounds about right before hitting reserve (depending on how agressive you ride!), doubt you were loosing any fuel on the ride

 

[bluespark]

Is there supposed to be an o ring down in the hole that the float needle seats into?

 

[desertgasser300]

Is there supposed to be an o ring down in the hole that the float needle seats into?

No oring. How does the float needle look?

 

[bluespark]

Float needle was installed new right before 8 hours of weekend riding (ran "ok" for that, no flooding just running hot) and looked good. I had re-set the float height to 8mm (not parallel) from 6mm (and parallel to gasket surface) to remedy fuel overflowing when leaned over, which it did seem to fix.. I didn't see any junk in the bowl and it held pressure when I hooked up my HF brake bleed pump to the fuel inlet. I tried knocking it with a screwdriver handle last night and it was still pissing. I'll get it back on the bike tomorrow nite and see what happens.

I did notice a reddish film on the slide:

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It was a pretty dusty weekend, and I had noticed that the two clamps holding the rubber boot between the carb and reed cage were a tad loose, but not terribly. I'm also curious as to how efficient my fuel cap hose vent breather cap is? It would easily pass air in and out of the vent (it sucks AND blows, OHHHH!)

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On a maybe unrelated note, how does the rubber stopper look on my choke seat? Supposed to be recessed like this?

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