Originally posted by kc5qdf
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Originally posted by zsrbpk View PostCarbs just are foreign language to me I don't know much I'm afraid I'll take them apart and mess something that's why I rather get it from someone else
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Originally posted by zsrbpk View PostJust read that the petcock can lead to oil in the gas tank and not the carbs
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Originally posted by zsrbpk View PostOk so I need to replace the float needs and adjust float height
Until you do that, tuning your carbs is a moot point as you have extra fuel flowing into your engine.
Don't get me wrong, you should still check and fix your petcock. If it flows gas in any position other than Prime with the engine off, it's not working right either. But the main cause of fuel in gas is the float needles.
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Originally posted by zsrbpk View PostJust read that the petcock can lead to oil in the gas tank and not the carbs
This makes no sense at all...
The petcock does not suck oil out of the engine and pull it all the way up to put it in the tank... or anything else for that matter.
Seriously though (cause I'm pretty sure you didn't really mean it the way it reads)....
Fuel starts in the tank. The petcock is just a valve to allow fuel to flow from the tank to the carbs. The valve is vacuum operated. It does not control flow rate, just on/off. When in prime, or when vacuum is applied, it's pretty much flowing fuel. This means when the engine is running, fuel is always flowing for the correct setup.
The carbs each have a float and a needle. Fuel enters the carbs around the needle, until the fuel level pushes the floats up against the needles. The needles then seal off the in flow of fuel into the carb body. So when the bowl if "full" at the specified level, no more fuel can flow into them if the flaot and needle are working properly.
If the float and needle are not working right, then fuel will continue to flow in and overflow the carbs. The fuel has to go somewhere, and 1/2 the time it's into the cylinders. The gas washes down around the pistons and deposits into the crank case mixing with the oil that is stored there.
The problem with blaming it on the petcock... Even a properly working petcock does not stop the fuel from flowing when on prime or vacuum is applied (the entire time it's running). This means that if you only focus on the petcock and make it work right... your STILL flooding the engine when the bike is running, and all the fuel between the petcock and carbs will flow into the carbs when the engine is off... causing the same issues with over flow of the carbs and filling the engine with fuel. It's just a little slower as your not dumping the full tank all at one time, unless you left it on prime.
If there is fuel in your oil... it's the carbs, and the carbs only that are the serious problem that needs fixed.
The petcock is a secondary issue entirely in this situation. Fix it if its not working right, but that isn't going to stop the main problem.
Krey93 750 Kat
Modified Swingarm, 5.5 GSXR Rear with 180/55 and 520 Chain, 750 to 600 Tail conversion, more to come. Long Term Project build thread http://katriders.com/vb/showthread.php?t=96736
"I've done this a thousand times before. What could possibly go wron.... Ooops!"
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Originally posted by 05RedKat600 View PostDamn Krey, I didn't really realize what he actually said. I read it as "gas in the oil" lol.
I did a triple take, and then still though that I was reading it wrong...
Krey93 750 Kat
Modified Swingarm, 5.5 GSXR Rear with 180/55 and 520 Chain, 750 to 600 Tail conversion, more to come. Long Term Project build thread http://katriders.com/vb/showthread.php?t=96736
"I've done this a thousand times before. What could possibly go wron.... Ooops!"
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