Yellow Residue In Carbs

My bike sat for a year until I recently tried starting it. I added stabilizer to the last batch of gas that I put in the tank last fall but I ended up dumping it and filling the tank with fresh gas anyway. The battery is new. All new Plugs last fall. Well, she wouldn't start for crap. I drained that carb bowls and the gas smelled bad. One bowl would barely had a trickle. I decided to open the carbs up and discovered a yellow residue in the bowls and on the jets. I cleaned everything spic-n-span. Sprayed Gummout through all the holes and blew them all out with compressed air.
Can anyone tell me what this yellow residue is? Is it something that the refiner adds to the gas?

 

Probably. It might be a good idea to go through your whole carbs.

 

might be from the stabilizer too.

 

What brand stabilizer did you use?

 

When I originally cleaned my carbs they had the same stuck on powder residue you are describing. There was no stabilizer in the gas. I just figured it was a component of the dried gasoline. It came off with carb cleaner and a nylon bristle brush

Loren

 

if its brownish yellow maybe oil blow back had that very thing happen to me on the kz1300 a problem that i wish i never see again but could most likely be old varnish stabilizer is a good thing but not a true fix for varnish just helps

 

since gas is now ethanol. and soon to be a higher concentration. that might be the cause also.

 

Can anyone post a picture f the yellow film?

 

It's just garden-variety varnish left over from the evaporated gasoline.

That's why one uses fuel stabilizer in the first place. But, as mentioned, it's just a help-out, not a cure...

 

And that's why you drain the carbs for long term storage.

Stabilize the full tank of fuel to preserve the tank, then burn the old gas in the wife's car. The XJ gets fresh gas.

 

The Green Marine Sta-Bil is good for storage because it has stuff in it for ethanol treated fuel.

 

KZ1300? What a monster! haha

 

I think it's from Ethanol or Summer additive.

I let the 900 sit too long and lost the 3 Carb to "Stuff".
The Filtler was clean as a whistle.

It only sat about 7 Weeks.
That did it.

 

Oh yes, indeed! 'Today's' gasoline, especially the ethanol, will turn in as little as two weeks!! Seen it happen!