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Joined: Aug 5, 2016 16:54:21 GMT -5
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Post by warpig on Jun 20, 2017 22:15:29 GMT -5
I have a 2016 atm50 that I just installed a 80cc bbk last week. It's been running great until tonight. I took off from work and when I hit 10mph it started sputtering and backfiring until about 20 - 25mph then it took off. Did this every time I had to stop and start. Got it home and took it inside put it up on center stand and it did the same thing with no load. Also I noticed a slight flickering of my dash lights. This is a brand new engine that i installed the bbk before i even ran it. New carb with a  jet also. Something else i noticed. There was a slght flicker of my dash lights during the backfire and sputtering. Any ideas before I start blindly taking it apart? Thanks guys. |
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Post by toddmaples on Jun 21, 2017 13:51:06 GMT -5
I have a 2016 atm50 that I just installed a 80cc bbk last week. It's been running great until tonight. I took off from work and when I hit 10mph it started sputtering and backfiring until about 20 - 25mph then it took off. Did this every time I had to stop and start. Got it home and took it inside put it up on center stand and it did the same thing with no load. Also I noticed a slight flickering of my dash lights. This is a brand new engine that i installed the bbk before i even ran it. New carb with a jet also. Something else i noticed. There was a slght flicker of my dash lights during the backfire and sputtering. Any ideas before I start blindly taking it apart? Thanks guys. Sounds like your carb needs adjusting. Try adjusting needle position out one slot. Edit: noticed you said it was running fine for a week beforehand. Check to see if your jets are tight. Had an idle jet work loose on a new carb before and showed these symptoms. |
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Post by wheelbender6 on Jun 21, 2017 19:13:58 GMT -5
I would definitely try SeaFoam or another fuel additive before tearing into the carb or head.
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Post by toddmaples on Jun 21, 2017 19:27:43 GMT -5
I would definitely try SeaFoam or another fuel additive before tearing into the carb or head. Terrible advice. These engines have nothing to gain by using these additives in them... Easier/cheaper to run ethanol-free gasoline, and clean the carb before every riding season, or once/twice a year if youre lucky enough to ride year round. |
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jet also.
