Anyone familiar with Hyosung motorcycle?

[mike042]

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 

[Freebird]

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.  

[mike042]

That's why I'm thinking oxygen sensor because it is fuel injection 

[Marcarl]

Any cliffs around your area? just askin.

[Pasta Burner]

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.

[mike042]

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