I went to change my oil and there was gas in it could someone please help?
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Has the bike fallen over?90% of motorcycle forum members do not have a service manual for their bike.
Originally posted by BadfaerieI love how the most ignorant people I have met are the ones that fling the word "ignorant" around like it's an insult, or poo. Maybe they think it means pooOriginally posted by soulless kaosbut personaly I dont see a point in a 1000 you can get the same power from a properly tuned 600 with less weight and better handeling.
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how much fuel we talking - could you see it sitting on top through the oil view window- take the fuel line off the tap is it flowing - it shouldnt be whilst the engine is off unlesss its on prime - if it is then theres a problem with the diaphragm and this will just carry on filling the bowls - could be a stuck float this should just drain through the overflow but can fill in the cylinder and find its way down the pistons and into the oili pitty the fool that dont ride oldskool
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^^^^ Haha 6 years later...My build thread (Black Betty) '97 600 (Dearly Departed)
http://katriders.com/vb/showthread.php?t=133286
2007 GSXR 750
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Originally posted by tic View PostIt's not the only way. A bad petcock will allow gas into the crankcase
So a bad petcock definitely needs addressing. But if your carbs are in correct working order, a leaky petcock will not be able to pass fuel through them to the crankcase.1998 Katana 750
1992 Katana 1100
2006 Ninja 250
2006 Katana 600 RIP - 130k miles
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Wasnt intending on busting your chops. Everyone's a newb at some point, so I generally try to be as specific as possible in case someone who isn't knowledgeable comes across it.1998 Katana 750
1992 Katana 1100
2006 Ninja 250
2006 Katana 600 RIP - 130k miles
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So how is the petrol actually getting into the oil?
"A bad petcock will let fuel through to the carbs instead of closing off"
How does it get from the carbs to the crankcase? If petrol is coming out of the overflow it will just drip out onto the crankcase underneath the carbs.
Or is it going through the main jet past the needle?Last edited by Bettyswolloks; 10-15-2015, 01:09 PM.I'm Only 4 Fut 3, But I Look A Lot Bigger From A Distance?
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If the petcock doesn't stop the fuel, a functioning carburetor should stop it. Fuel flows down the hoses and fills tha carb bowls. There is a mechanism in the carbs that closes off the fuel inlet by using a "float" when the fuel level rises, the float moves to the top and the float needles close the reservoir. The problem is you can get debris in there from the tank and it will prevent the needles from seating correctly and sealing. When that happens the fuel level in the bowls continues to rise until it overflows the emulsion tubes (where needles sit) and then drains into the head. While it's sitting in the head, it will eventually drip down around the valves and into the combustion chamber, passed the pistons and into the case. Should you try to crank it in this situation the head literally gulps mouthfulls of fuel every time the valves open. Then you have 4 gallons of gas mixed with 4 quarts of oil in your crankcase.My build thread (Black Betty) '97 600 (Dearly Departed)
http://katriders.com/vb/showthread.php?t=133286
2007 GSXR 750
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Good explanation, thanks. I keep wondering when my 23 year old big kat will have a big problem. It's cherry now but it's never had the carbs apart or the engine. It's using a quart of oil every 2,500mi. now so I know it needs some attention but it still starts easily and runs good. I think I'm on borrowed time with 72,000mi.; especially after browsing these forums. I actually planned to keep it for many more years but now I'm not so sure. A total rebuild is waaaay over my head
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