mike042 Posted April 17, 2022 Share #1 Posted April 17, 2022 My gf,s hyosung gv250 2012 motorcycle, started to stuttering and backfiring, and ran so hot that muffler turned colors . Im thinking might be oxygen sensor. But i don't know how to pull trouble codes from ecm. There are no mechanics near me that will touch korean bikes. Thought I'd ask here before i throw it off cliff lol Link to comment Share on other sites More sharing options...
Freebird Posted April 17, 2022 Share #2 Posted April 17, 2022 I've heard of them and seen a couple but that's about it. Generally though, I would say that it's likely a carb problem and running way too rich. 1 Link to comment Share on other sites More sharing options...
mike042 Posted April 17, 2022 Author Share #3 Posted April 17, 2022 That's why I'm thinking oxygen sensor because it is fuel injection Link to comment Share on other sites More sharing options...
Marcarl Posted April 18, 2022 Share #4 Posted April 18, 2022 Any cliffs around your area? just askin. 1 Link to comment Share on other sites More sharing options...
Pasta Burner Posted April 18, 2022 Share #5 Posted April 18, 2022 Seafoam is where I’d start normally. However I have had multiple ethanol attacks to my injected bike exhibiting the same symptoms. (Had to replace all in tank components) Also had a batch of bad gas ( never believed in it till it happened) in my Wrangler. Start simple. 2 Link to comment Share on other sites More sharing options...
mike042 Posted April 18, 2022 Author Share #6 Posted April 18, 2022 Thanks i just changed both spark plugs, and seemed to fix it took it out myself for long ride and no more problems. And because of ethanol i always use startron in my RSV because of carburetor. But she always used it in the hyosung Link to comment Share on other sites More sharing options...
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