Left side carb leak, popping, new float bowl.

Leejin · Jun 25, 2013

So my float bowl's drain plug threads busted so I ordered a new one. It didn't come with this long pin/jet thing.. I threw the carb on and it leaks fuel.. The site I usually use to check my carb's parts is down right now.

I can get my bike started, but fuel just drips from the left carb. If I lean it sideways.. it will like. FLOW out really fast. I'm thinking ruptured floats or something.

Here is the older bowl.. what is the long pin? I tried to remove it to no avail..

Edit.. i forgot to add; I THINK these are BS38s, from a 78.. But my bike is registered as a 72.. No idea. So sorry.

Leejin · Jun 26, 2013

Does anyone know what that needle us, or if it's required for normal operation? I can't seem to remove it from the old bowl.

5twins · Jun 26, 2013

Don't bother, it won't do anything in the new bowl. That is the overflow tube for when or if the fuel level gets too high in the bowl. It sounds like the new bowl you got is the '78-'79 version. It did not have that tube nor did it have the nipple on the bowl bottom to let the overflowing fuel out. Like I said, that tube won't do anything in your new bowl even if you did manage to put it in there.

TwoManyXS1Bs · Jun 26, 2013

If your bike is a `72, and the carbs are `72, don't use `76-`79 bowls.

Leejin · Jun 26, 2013

TwoManyXS1Bs said:
If your bike is a `72, and the carbs are `72, don't use `76-`79 bowls.

Well, It's registered as a 72, but I think the motor/carbs are off a 78..

5twins · Jun 26, 2013

That's not a '78 carb bowl you're holding in your hand there, it's a '76-'77 bowl. Show me a picture of your carb set and I can probably tell you the year they're from. I would need to see the intake side where the air filter mounts. It's possible to fit the bowl you're holding to a '78-'79 carb set but it's not the proper one for it.

Leejin · Jun 26, 2013

5twins said:
That's not a '78 carb bowl you're holding in your hand there, it's a '76-'77 bowl. Show me a picture of your carb set and I can probably tell you the year they're from. I would need to see the intake side where the air filter mounts. It's possible to fit the bowl you're holding to a '78-'79 carb set but it's not the proper one for it.

Oh no... would that cause the popping and fuel leaking?

CalsXS2 · Jun 26, 2013

Take it apart and check the needle seat.

Does the bowl gasket look ok.

If you shut the fuel off, does it still leak.

You could always switch bowls side to side and see if the leak follows.

Leejin · Jun 27, 2013

CalsXS2 said:
Take it apart and check the needle seat.

Does the bowl gasket look ok.

If you shut the fuel off, does it still leak.

You could always switch bowls side to side and see if the leak follows.

I'm hopefully going to have some time to work on it tonight..

But it never leaked from the gasket. I remember my carb leaking only a little before the swap.. Now, the intake just dumps fuel out.. As long as fuel is in the line.

Left side carb leak, popping, new float bowl.

Leejin

XS650 Enthusiast

Leejin

XS650 Enthusiast

5twins

XS650 Guru

TwoManyXS1Bs

BBQ Hunter

Leejin

XS650 Enthusiast

5twins

XS650 Guru

Leejin

XS650 Enthusiast

CalsXS2

XS650 Guru

Leejin

XS650 Enthusiast

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