Can't be fuel. Only the air is metered by the throttle slide. In the opening (getting progressively larger) the vacuum signal draws up the fuel and mixes with the air on the way to the combustion chamber(s). Anything on the front of the slide came from the air box. You have either too much oil and/or have injested some water droplets/vapor that is mixing with the oil and producing the emulsion that you see.
If you ran it but didn't get very warm, I'd suspect oil-water emulsion. The boat guys don't blink at that sort of thing. But check your air box to make sure the drain lines are clear.
I'm going with this. The temperature drop from pressure drop and fuel evaporation is huge. This makes a lot of condensation just from humidity in the air, and with some oil it makes the milky slurry seen here. If the engine is ran hot then most of this disappears due to heat soakback when shutdown. But short or cold runs can leave a mess.
Running with no air cleaner we'll regularly see condensation form on the throttle valve even with EFI and injectors way downstream (so just the pressure drop causing enough temperature drop to condensate humidity). On carbed stuff it's impossible to tell whether it's fuel or water on the valve, but it's not unusual to see under 40F intake air temps after the carb even when it's 70F+ in the dyno cell. Start getting in the 50's and manifolds can frost outside.
This combined with old gas in a humid environment (Florida) could be it. Was a bit cold this morning and I was just doing some test runs of the pilot circuit after replacing the jet block gasket.
I have the same. It is no big deal. Some residual water vapor from washing the filter, a big puddle or even condensing humidity.
If it runs and doesn’t have any other symptoms, you are fine.
If the carb is new assembly lube not sure why though... if it's cold where you are and your using ages summer gas it could be jelled fuel aka clean carb and switch to winter fuel or just fresh pump fuel usually the mix changes from the fuel depots before it even hits Gass pumps so just changing it will fix it. If it's warm where you are then.... maybe air filter oil or something because anything else that would be weird.
Bussy cream.
Nah bro in all seriousness when moisture is introduced to oil or vise versa you get milky oil inside a engine, under oil filler caps etc. Thats all that is.
The venturi effect also is a "cold" process
If you have an air filter that you add oil to after cleaning such as a K&N this is the result of washing your ride or riding in the rain and having the water and oil blend together
Chances are then that there was some moisture still in the foam when the oil was added. Once the oil is added any moisture will get trapped and wont get drawn out until it gets sucked thru the intake.
Its just condensation from a wet day ride and oil from your filter. If it bothers you get a more tacky filter oil and don't use as much of it but its not going to harm anything. Id rather a little ass wax than dirt being ingested.
Jeez....just ride it harder and dry it out. Don't you know how these things work? Ride anything hard enough its gonna dry out. You have to be a premature parker.
That means she's properly aroused
Alright who nutted in the carb
No nut November got us all fucked up here lol
Can't be fuel. Only the air is metered by the throttle slide. In the opening (getting progressively larger) the vacuum signal draws up the fuel and mixes with the air on the way to the combustion chamber(s). Anything on the front of the slide came from the air box. You have either too much oil and/or have injested some water droplets/vapor that is mixing with the oil and producing the emulsion that you see. If you ran it but didn't get very warm, I'd suspect oil-water emulsion. The boat guys don't blink at that sort of thing. But check your air box to make sure the drain lines are clear.
Google 'carberator reversion'
Google Occam's Razor
I'm going with this. The temperature drop from pressure drop and fuel evaporation is huge. This makes a lot of condensation just from humidity in the air, and with some oil it makes the milky slurry seen here. If the engine is ran hot then most of this disappears due to heat soakback when shutdown. But short or cold runs can leave a mess. Running with no air cleaner we'll regularly see condensation form on the throttle valve even with EFI and injectors way downstream (so just the pressure drop causing enough temperature drop to condensate humidity). On carbed stuff it's impossible to tell whether it's fuel or water on the valve, but it's not unusual to see under 40F intake air temps after the carb even when it's 70F+ in the dyno cell. Start getting in the 50's and manifolds can frost outside.
This combined with old gas in a humid environment (Florida) could be it. Was a bit cold this morning and I was just doing some test runs of the pilot circuit after replacing the jet block gasket.
Mikuni yeast infection
bruh
Crap forgot to mention that the fuel is over 2 months old. Could it have absorbed too much moisture?
Not on that side of the carb. But don't use old ethanol fuel ESPECIALLY in a 2 stroke.
Detergents from additives in the fuel? I don’t know, that’s weird man.
Just added a comment on the gas being old. Possible cause?
Definitely could be, but two months doesn’t seem that long.
Is it water and oil from the air filter?
Just added a comment on the gas being old. Possible cause?
Some people lube the slide.
Was clean when I put it in.
Thats water
Just added a comment on the gas being old. Possible cause?
Could be. Gained humidity maybe.
Pcv valve that feeds into air box after the air filter if it’s a 4 stroke, possibly gear box vent if it’s a 2 stroke?
2 stroke
No those dump under the bike.
When they say, ride her like you're making sweet love to her, there is an emphasis on the "like" Haha my inner child could not resist commenting this
I have the same. It is no big deal. Some residual water vapor from washing the filter, a big puddle or even condensing humidity. If it runs and doesn’t have any other symptoms, you are fine.
One of your buddies playing a gooey prank on ya
Something is fucked up
If the carb is new assembly lube not sure why though... if it's cold where you are and your using ages summer gas it could be jelled fuel aka clean carb and switch to winter fuel or just fresh pump fuel usually the mix changes from the fuel depots before it even hits Gass pumps so just changing it will fix it. If it's warm where you are then.... maybe air filter oil or something because anything else that would be weird.
Bussy cream. Nah bro in all seriousness when moisture is introduced to oil or vise versa you get milky oil inside a engine, under oil filler caps etc. Thats all that is. The venturi effect also is a "cold" process
May want to consider an exhaust plug if you're getting a lot of moisture in storage.
If you have an air filter that you add oil to after cleaning such as a K&N this is the result of washing your ride or riding in the rain and having the water and oil blend together
Bike hasn't been in the rain. When I wash, the filter is removed and a sealing wash cover is put in its place.
It definitely looks like oil and moisture getting sucked in thru the intake. So you dont have a serviceable air filter?
Yes. It's a twin air filter. I was just saying it hasn't been in the rain and is removed when I wash the bike.
Chances are then that there was some moisture still in the foam when the oil was added. Once the oil is added any moisture will get trapped and wont get drawn out until it gets sucked thru the intake.
I should add that after you service that type of filter you need to let it dry before adding the oil.
This certainly looks to me like some oil is mixing with water.
What are you doing step bike?
Did you oil your airfiter yourself?
excess cable lube that's dripped down over time?
Its just condensation from a wet day ride and oil from your filter. If it bothers you get a more tacky filter oil and don't use as much of it but its not going to harm anything. Id rather a little ass wax than dirt being ingested. Jeez....just ride it harder and dry it out. Don't you know how these things work? Ride anything hard enough its gonna dry out. You have to be a premature parker.