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Post by psm on Jun 19, 2015 17:04:24 GMT -6
Hello to everyone
Im new to this board but not new to fixing my own bikes be it motorcycle, moped, or scooter. I recently purchased a Rave 150 which looks like a clone of the Yamaha I think called a Zuma. Either way it didn't run and I noticed it was because the spark was very pour. I got a new CDI and Coil with spark plug cable and cap from Scrappy dog. After mounting it the spark was 10 times better and it started right up first try. Sadly it only ran for about 30 seconds before it died out and now won't restart. Trying to restart it I noticed that gas start pouring out of the airfilter so I took it apart and saw that a line runs from the cylinder head to the airfilter and it from here that all the gas is coming out of. It's clearly getting gas and a strong spark so I don't understand why it's not starting and so much gas is pouring out. I checked the petcock it works fine so it's not that. I thought maybe it was the automatic choke but usually it that situation it will just run with very high rpms. Hopefully one of you fine fellows will be able to help me with this. Thank you in advance for your time and help in this matter.
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Post by Alleyoop on Jun 19, 2015 17:23:44 GMT -6
Usually if there is gas in the airfilter it means the carb is flooding, which means the float in the carb bowl is NOT shutting off the fuel when full and gas just keeps on coming into the carbs bowl and gas comes out floods the motor and gas also flows back to the airfilter. The line your talking about saying that is comes from the cylinder head is most likely the Valve Cover Vent hose which on most connects to the airfilter box. Are you talking about this line? Alleyoop  |
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Post by psm on Jun 19, 2015 17:28:37 GMT -6
Yes sir that is the line I'm talking about. If the float was sticking open it would flood none stop no? It's only happening when the start button is being pressed.
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Post by Alleyoop on Jun 19, 2015 17:33:45 GMT -6
That line is the motors crankcase Vent Hose has nothing to do with the flooding. Does the motor start or not?
It will flood anytime vacuum is applied to the PETCOCK to allow gas to flow to the carb. The problem is the Float in the carb is NOT stopping the incoming fuel. So yes when hitting the start buttom the motor is turning over it is creating Vacuum and opening the petcock diaghram so that fuel will flow to the carb.
You need to take the carb off and check the float and test it to make sure when the float moves up it shuts off the fuel inlet.
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Post by Alleyoop on Jun 19, 2015 18:19:23 GMT -6
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Post by psm on Jun 19, 2015 20:54:01 GMT -6
Thank you very much I will try that tomorrow.
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Post by cyborg on Jun 19, 2015 22:11:03 GMT -6
My call as well,,,carb float problem
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Post by psm on Jun 20, 2015 12:52:00 GMT -6
Well it wasn't the float but it was short of float related. Turned out the gas line was hooked up to the carb wrong. It was basically bypassing the float and just dumping gas into the carb and engine. Runs great now, thanks for the help I wouldn't have notice the line if I wasn't checking the float.
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Post by Alleyoop on Jun 20, 2015 12:58:57 GMT -6
WOW!! Would have never entered my mind that someone would connect the fuel line to either the VENT or DRAIN. Next time I will ask for a picture of the carb area and hoses, then I would have spotted the problem right off the bat.   1. The Drain on the bottom of the carb? 2. The Vent near the top of the carb? OK I added a little more info to the new CARB FLOODING THREAD: Alleyoop |
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Post by psm on Jun 20, 2015 13:40:15 GMT -6
It was attached to the vent near the top of the carb. The guy I got it from must have switched the lines by accident when he was trying to figure out what was wrong with it. The new CDI and Coil fixed the original problem of very poor spark but the guy fiddling with it added another problem lol.
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Post by skunkhome on Jun 24, 2015 19:27:10 GMT -6
Usually if there is gas in the airfilter it means the carb is flooding, which means the float in the carb bowl is NOT shutting off the fuel when full and gas just keeps on coming into the carbs bowl and gas comes out floods the motor and gas also flows back to the airfilter. The line your talking about saying that is comes from the cylinder head is most likely the Valve Cover Vent hose which on most connects to the airfilter box. Are you talking about this line? Alleyoop I am always impressed with how pretty your photos are. And clean as a whistle as if right off the factory floor. |
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Post by cyborg on Jun 25, 2015 6:54:16 GMT -6
It was attached to the vent near the top of the carb. The guy I got it from must have switched the lines by accident when he was trying to figure out what was wrong with it. The new CDI and Coil fixed the original problem of very poor spark but the guy fiddling with it added another problem lol. fantastic!!!!! glad you sorted it out!! |
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Post by cyborg on Jun 25, 2015 6:55:40 GMT -6
Usually if there is gas in the airfilter it means the carb is flooding, which means the float in the carb bowl is NOT shutting off the fuel when full and gas just keeps on coming into the carbs bowl and gas comes out floods the motor and gas also flows back to the airfilter. The line your talking about saying that is comes from the cylinder head is most likely the Valve Cover Vent hose which on most connects to the airfilter box. Are you talking about this line? Alleyoop I am always impressed with how pretty your photos are. And clean as a whistle as if right off the factory floor. Alley is a very sick person,,,he steel wools his bike like twice a week,,,,, |
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..BAD TO THE BONE..
