Question about 1996 Suzuki GSX-R 750 T

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I HAVE A 1996 GSX R750T THAT I HAVE BEEN WORKING ON FOR SOME TIME AND WAS HAVING AN ISSUE WITH GAS IN THE CRANKCASE I HAVE BEEN READING MANY FORUMS AND POSTING ALOT OF QUESTIONS ON THE MATTER TRYING TO AVOID THE DEALERSHIP FEES. I HAVE REPLACED THE PETCOCK AND ORDERED NEW NEEDLE ASSEMBLIES FOR THE FLOATS. IS THERE A POSSIBILITY THAT GAS COULD LEAK INTO THE CRANKCASE VIA THE VACUUM LINE? IF SO COULD SOMEONE EXPLAIN THE PROCESS?

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I had the same problem , the needle is sticking and flooding the motor by going past the rings and into the crankcase , change the needle or sometimes you can just run some good gas cleaner through and shut off the gas when you stop . The gas cleaner is the cheapest way to go if it works for you

Posted on Aug 05, 2009

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Hi and welcome to FixYa,

While the vacuum line to the fuel cut-off valve is a possibility, it would be very remote as it would result to an abnormally high idle or flooding since the vacuum is only present when the engine is running. A most likely possibility is any of the fuel inlet valve not closing the fuel inlet port as actuated by the floats. Common problems are dirt/sand/rust stuck in either the valve or the float allowing fuel to flow even if the bowl is already full; necks/grooves/scratches on the needle, float height adjustment or in some instances, punctured floats.

God luck and thank you for asking FixYa.

Posted on Aug 01, 2009

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2 Answers

I HAVE A 1996 SUZUKI GSXR 750T, I ASKED A QUESTION A FEW DAYS AGO CONCERNING THE GAS IN THE CRANKCASE. THE TECH SUGGESTED THAT THE FLOAT WAS STUCK ALLOWING GAS FROM THE TANK TO CONTINUALLY FLOW INTO THE...


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