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gas in oil - a lot of gas

12K views 19 replies 8 participants last post by  bbehrendt 
#1 ·
So 2 years ago I had to park the bike (TT600). I finally brought it out and decided that I should get it started again. Well... I checked the oil, and it started spewing gasoline ().

I have decided to fix the bike, so far I have done an oil change, and removed the manifold, which also had gas sitting in it. I just picked up new spark plugs. I plan to remove the jets and test them with the 9volt battery trick, and I have bought a usb to bluetuooth thing to hook up tuneECU to test the computer.

I am guessing the jets are stuck open, either from the computer or dirty jets. Has anything like this ever happened to anyone? Any suggestions? Is there any other place I should check for gasoline?

-bj
 
#3 ·
Yikes! Only time I've seen something like that is when I forgot to shut off the petcock on my old two stroke, has gas pouring out of my exhaust. Sounds like you're on the right track by looking at the injectors as they're the only way for gas to get into the engine. That is unless someone poured a whole bunch of gas into your airbox and it made it's way in through the the crankcase vent tube, but i'm guessing thats not what happened.

Don't have a lot to offer advice wise except to maybe get some oil in the cylinders and turn it over by hand to lube up the cylinder walls. I'm sure they've been completely washed of oil. Also, after putting in fresh oil I would try cranking it for a little bit with the plugs out yet to circulate oil around the motor before attempting to start it.
 
#4 ·
Float or float needle stuck , gas petcock left open. Rebuild the carb , change the oil, get rid of the old gas. No biggie. You can use welding tip cleaners to clean the jets and carb passages, then spray cleaner. Remember when you spray it in it has to come out somewhere. If it doesn't, it's still clogged.
 
#7 · (Edited)
This is one of the reasons I moved from petcock & carb to fuel injected. Subbed for root cause on an FI bike!! Both the pump and the fuel injector would have to leak + get into the crankcase, but how?? Was one of the cylinders full? Wait, not direct injected, so it would leak into the intake port area. As long as the tank is above, then it will fill up from there until there's a path to below.
 
#8 ·
There's only two ways for fuel to have made it to the leaking injector, the hi pressure line through the pump or the low pressure line through the pressure regulator. Both the pump and regulator could still work fine, but given two years of sitting any amount of flow from either source would be enough to flood an engine with an injector stuck open.
 
#10 ·
Silver tube as in one of the quick disconnects? A little dribble when you disconnect the lines is fine, but a constant flow would be no good. The quick disconnects should stop fuel when they're disconnected, if they don't you have a bad oring in the leaking one. Did your bike have the recall performed to replace the male connectors with aluminum ones, the originals are plastic and very easy to break. Also be careful with the female connectors on the tank as they are easy to break as well and weren't covered under a recall.

If you're talking about anywhere else, then probably not normal.
 
#11 ·
Had an old GS1000 do that.

Filled up the engine, and the exhaust system. Somehow didn't fill any cylinders.

Fired right up when I hit the button. Blew gas all over me, the bike, the other bike and all my tools.

Ended up being a hole in the vacuum operated petcock.

I'd lean toward an injector being stuck open.
 
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