Carb pooring out gas

reptile_spot · Nov 12, 2009

Not sure what is making this happen the bikes been running great for awhile. But I hit a bump a few days ago. It seemed to be doing fine but got home and noticed my gas tank was totally empty and the engine and chain was covered in oil. Filled it up and seen the gas is pooring out the carb nearly as fast as I poor it in. I've taken the carb off cleaned it then it ran well for about 2 blocks then sputtered out. Thing was pooring out gas again. Adjusted the fuel flow from the tank and on the carb in to try and compensate but there is no in between it seems. *Opened to 1/2 or full it will spew out gas. I've got a way to get it to run for a few minutes at a time by starting the engine with the gas totaly off then opening it once its moving. It won't leak and flood out for about 2-3 blocks. Then it starts choking and sputters out pooring gas all over.

After looking threw the forums for awhile I wasn't able to find any post with this problem so I figured I would toss up a thread and ask if anyone has any idea on what might fix it. I know there are some little metal risers in the carb I could bend that might fix the leak but I want to ask and make sure before I do anything like that.

Ilikeabikea · Nov 12, 2009

Your carb float is probably out of adjustment or you got some trash in your needle and seat valve. Do you have a fuel filter between you tank and carb?????????

bairdco · Nov 12, 2009

yup, probably stuck float. or broken float. or adjusted wrong float.

and with the gas off and it still leaks, your carb petcock might be messed up. what about the one on the tank? if you turn that off, does it still leak?

and one more tip. flashy pictures are kinda annoying. trying to focus on your bike to check obvious problems is no fun when the pics keep changing...

Ilikeabikea · Nov 12, 2009

In fact some floats have cracked and will fill up with gas. That will do it also................

Norman · Nov 12, 2009

look like you guys got it covered, wrong float adjustment, sticking float needle or full of trash,or the float that has turned into the Titanic.

reptile_spot · Nov 12, 2009

Yeah, I've got a fuel filter in the line. I'll try taking it apart here soon and see if there is a crack in the float or anything obstructing it.

On another note. The air filter is a very tight fit on this bikes frame "that's why its just a filter and 2 screws in the pic". Could someone post where to get a shorter intake?

Norman · Nov 12, 2009

I make an off set intake for the carbs that don't have room to fit with out hitting the frame.

Motor Boys · Nov 13, 2009

I have extended intakes and cut them short aswell to fit depending on what people want. The best thing to do is make one , make friends with someone who has a welder its a 2 min fix.

K.i.p · Nov 13, 2009

I will have to adress a frame interferance problem shortly. I am all set except the throttle cable housing will hit the horizontal frame member. May I see a couple pics of off setting the carb. Ultimately that will be my solution either by a short length of hose or fabricating an angled intake manifold. I don't want to re-invent the wheel if it has been solved and done befor. Thanks. A couple pics will help me out allot.

Motor Boys · Nov 13, 2009

Her you go I paint them after I make them so they may be hard to see, also had I have known I was going to send pics out I would have taken close _ups. Sorry. These are a couple of early attemps, I have made them better and I find it works and looks better on the right side and behid the seat, but these were the only 2 I had saved. Sorry, hope they give you an idea.
Thanks

reptile_spot · Nov 13, 2009

Here are some pics. My camera is acting up so only have a few that are not all blurred up. You can see there is about 1mm gap from the top of the carb to the frame and I have the cable drilled threw the frame. The Plastic is touching the frame. I a plastic cover to fit to the frame. BTW thanks on the quick replies everyone!

K.i.p said:
I will have to adress a frame interferance problem shortly. I am all set except the throttle cable housing will hit the horizontal frame member. May I see a couple pics of off setting the carb. Ultimately that will be my solution either by a short length of hose or fabricating an angled intake manifold. I don't want to re-invent the wheel if it has been solved and done befor. Thanks. A couple pics will help me out allot.

Norman · Nov 13, 2009

a couple photos of my off set intake

my offset intake is short, fits in tight frames

[/IMG]

reptile_spot · Nov 13, 2009

I like those Norman. How much you charge for one?

Norman · Nov 13, 2009

$30.00 they are kind of expensive it take the longest time to make the flange. I machine the nipple to fit the carb as well make it fit better. I include 2 socket head cap screws(allen wrench headed bolts) and a couple of gaskets.
Shipping is $5.00 it will go first class USPS mail.
I can't tell if your carb has a fuel bowl drain on it if it does I will need to make allowances for it.

reptile_spot · Nov 13, 2009

Yeah, It has a fuel drain on it.

K.i.p · Nov 13, 2009

Thanks for the pics! Those are all viable solutions to my problem. I guess I have some thinking to do but I like that tight offset intake idea, and it is the direction I have been leaning towards. Just had my modified frame welding done today and finger tightened the motor down. Happy with fit except the throttle issue.

Sorry to destract the thread, I will step aside. Thanks guys!

reptile_spot · Nov 14, 2009

Here is a pic of the other side. To help get an idea on intake. I def need to put the plastic cover back on the filter I out why my carb keeps screwing up. Tiny bits of blow sand keep getting into it and sticking to the walls inside and making everything stick. I'll def buy one of those intakes Norman. I sent you a PM.

BarelyAWake · Nov 14, 2009

Those sponge "filters" are a joke... and a bad one at that, if you end up gettin an offset manifold you'll defo wanna get a K&N style filter (many of this forum's sponsors have them) or you could get all crazy and do this (I had to angle my intake as well btw): http://motorbicycling.com/f4/remote-airbox-intake-silencing-cheap-10967.html

reptile_spot · Nov 14, 2009

That's a good idea. Kind of like my old dirt bike. Going to have to find a old lawn mower filter box or something. Thanks for the post! I'll give it a shot once I get the new intake.

K.i.p · Nov 14, 2009

Solution near at hand. I picked up a 45 degree copper plumbing elbow today that is nearly made to order. I will need to knock out a simple nipple on the speed lathe to clamp the carb onto. I plan to shorten the kit intake, slip the fitting over it (with silicone and clamp, insert and braze the fabricated nipple, and attach carb. The fit is very close. Do I have a shot at brazing copper to the pot metal kit intake?

Carb pooring out gas

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