[Kelvin Parker]

I recently purchased my first bike. Its a hyosung gt250r. Ran perfect when I first got it. Other day I overtook a vehicle and one of the two cylinders went dead. At lower rpm its running perfectly. When it gets to 6k rpm the cylinder starts misfiring and sputtering. At 7k rpm completely dead. I've cleaned the carbs, changed all fuel lines and vacuum lines. Changed fuel filter, spark plugs... Nothing changed. I've stripped the carbs down to the pure housings multiple times making sure I haven't missed anything. Can a coil cause this issue or does this sound like a CDI problem with timing? The cylinder that stays running doesn't studder one bit and will run the engine to redline. I'm stumped.

 

[Kelvin Parker]

Also when I get it running right I'd like to find some people in Alaska that would like to go riding

 

[Kelvin Parker]

I want to start some YouTube vids with a go pro while riding through the mountains

 

[Dodsfall]

My first guess would be a fuel level problem. Have the floats been checked for the proper fuel level while installed on the motorcycle?

 

[Trey-D]

I want to start some YouTube vids with a go pro while riding through the mountains

Im not there in Alaska but feel free to enjoy some of my videos YouTube #justmeEvans