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Fuel oil drips out exhaust pipe

  • Thread starter Thread starter Prescot
  • Start date Start date
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Prescot

Guest
So bike fell this morning while parked!!
Now noticing fuel actually dripping out of the exhaust pipe at idle.
Was riding it earlier too and noticed some of this oil/fuel spray of the side of rear tire.

Did an oil change not that would fix the problem but it is considerably much more noticable.

So wonder just how bad is this cylinder head gasket? dirty floats?

:confused:
 
Can you show us a picture?
I have had gas leaking from a carb due to a fall over but it dried up eventually
 
Read that link.. The fall might have damaged the petcock and/or knocked one or more fuel needle seats around.
 
Yes there was and noticed it was kind of nauseating.

pulled the carbs to see if anything was sticking floats and needles seem fine.

Put it back on the bike and start it up now runs like its full throttle with not throttle or choke.
 
steve murdoch said:
That could be throttle cables hanging up someplace.
Did the petcock check out okay?
Click to expand...

Petcock looks fine no damage from the outside. Hoping it was a loose clamp on boot.
as for the cables checked that too chock and throttle cables are in idle with no tension. Did notice at times when turning the wheel over all the way it will throttle up, but now its throttled up anyways.

Also adjusted the pilot screw a little hoping to dial in the mixture is all it needed and not a new ignition coil.
 
Prescot said:
Petcock looks fine no damage from the outside. Hoping it was a loose clamp on boot.
as for the cables checked that too chock and throttle cables are in idle with no tension. Did notice at times when turning the wheel over all the way it will throttle up, but now its throttled up anyways.

Also adjusted the pilot screw a little hoping to dial in the mixture is all it needed and not a new ignition coil.
Click to expand...
I would check those throttle cables again. Idle increase when handlebars are turned sure sign they are being pulled. Then sticking in that position. Happened to me once
 
checks out idles okay
Wonder if the bit mystery oil ate uo the cyl head gasket though b/c there is smoke intead of fuel now?

Also thinking about replacing head gasket because there is some new oil I can see on gasket.

Recommendations on parts or performance parts seen ,Gasket King?
..
Worried if I have to go into the engine that much worth looking into new rings or pistons etc.
 
How long was the bike on it's side and which side?
I've seen oil come out the breather and half fill the airbox. Fuel could run straight through the cylinder with oil and fill the exhaust.
How long has the motor been running since it fell over and where does your breather go ?
If you have a lead acid battery it may have lost some.
 
Brendan W said:
How long was the bike on it's side and which side?
I've seen oil come out the breather and half fill the airbox. Fuel could run straight through the cylinder with oil and fill the exhaust.
How long has the motor been running since it fell over and where does your breather go ?
If you have a lead acid battery it may have lost some.
Click to expand...

Not long walked away for a minute and it had fell over.
breather tubes from carbs are just hanging there since using pods.

yes using lead acid battery now sucks as it is drippy too.

Actually rode it for about an hr before and since gotten worse seen in video.
Looks like its just bleeding out like the piston rings are gone frn 2nd cylinder. Concerned that if dirt got in there and just bored it out.
 
Is it possible that the oils is coming from somewhere like the stator cover and dripping onto the exhaust.
That leak looks too fast to be getting out the exhaust valve.
Is there smoke out the back of the muffler ?
 
Brendan W said:
Is it possible that the oils is coming from somewhere like the stator cover and dripping onto the exhaust.
That leak looks too fast to be getting out the exhaust valve.
Is there smoke out the back of the muffler ?
Click to expand...

Just checked the needle valve by tying the floats up with a rubberband and trying to blow water thru the fuel line and no leaks. So guessing it must be the exhaust valve unless it just freed itself overnight. Just to be sure want to pull a needle valve just to check it out but the pins holding the floats are pretty tight.

definitely not the stator cover it would have to travel from the other side and run down. Its making its way through the exhaust and leaking out where the header meets the muffler.
 
I'm voting for needle and seat or float that may have shifted from fall over and could be hanging up on the inside of the carb bowl.

Rubber bands to hold up the floats for a test put more pressure in the needle and seat than the normal level of gas applies to the them which may result in an misleading test result.
 
When it's humid outside condensation collects inside the pipes and then drips out. The OEM pipes have drip holes even to keep the baffles from rusting too fast.
 
Doug said:
I'm voting for needle and seat or float that may have shifted from fall over and could be hanging up on the inside of the carb bowl.

Rubber bands to hold up the floats for a test put more pressure in the needle and seat than the normal level of gas applies to the them which may result in an misleading test result.
Click to expand...

I pulled the needle valves and seat and just went through and cleaned the seats with a qtip. Put it all back together same result. Dont see how the float could have changed much more unless height is set wrong.
https://youtu.be/dVHQaxsect8
 
You may want to measure the fuel level using the clear tube method. That will tell you for sure if the fuel valve is working properly.
 
Nessism said:
You may want to measure the fuel level using the clear tube method. That will tell you for sure if the fuel valve is working properly.
Click to expand...

Talked to a mech over the phone for a minute asked if I put too much oil in? It was a little pass full, looked it up and may have popped an oil seal.
Trying now to get into the cyl head to check it out. If thats the case its just a matter of replacing the gaskets and o rings but getting there is a bit of trouble and getting back together right.
 
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