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03-22-2015, 05:35 PM | #1 |
Join Date: Mar 2015
Posts: 3
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gy6 150cc with performance exhaust back fires
I have just got my first gy6 150cc scooter I have had many scooters in the past but this is my first chinese scooter.
When I bought the bike it had a cadillac converter in the exhaust so I removed the stock exhaust and put a free flowing performance exhaust on it along with a perfermance cdi box and coil. The engine back fires sometimes when I let off the throttle a friend of mine told me it sounds like it is sucking in air form some where. I removed the exhaust and where the exhaust bolts to the cylinder head used some exhaust sealent I'm waiting to see if that fixes the problem. I'm not sure what else I can do if that is not the problem. |
03-22-2015, 07:10 PM | #2 |
Join Date: Sep 2010
Location: nyc
Posts: 57
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the acv on the carb richens the mix on decel. Have you done any other mods?
John |
03-23-2015, 08:29 AM | #4 |
Join Date: Mar 2015
Posts: 3
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no other mods besides the exhaust I plan on doing some transmission mods but right now it is the exhaust then go from there I have not changed the main jet yet.
I know main jets are different from place to place so are there any main jet kits for these bikes? |
03-25-2015, 06:48 PM | #6 |
Join Date: Sep 2010
Location: nyc
Posts: 57
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check the acv.
John |
03-26-2015, 03:20 PM | #7 |
Join Date: Mar 2015
Posts: 3
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I made a baffle that I put between where the header pipe and the muffler join witch seems to be working perfect and I have got more power on take off.
I have a new problem now my battery went dead on me a couple times so I charged the battery and put my volt meter on it and it is not always charging at 13volts it will drop down to 8 volts or lower then back to 13volts what can cause this to happen? |
03-27-2015, 05:51 PM | #8 |
Join Date: Sep 2010
Location: nyc
Posts: 57
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what is happening when it drops to 8volts?
John |
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