This is a good used ECU with EU Map originally from a 2016 KTM 500 EXC-F. I ran this on my 2013 KTM 500 EXC most recently (and a 2014/2015 too). This ECU ran great with a FMF Factory 4.1 exhaust. I had zero flame outs and good fuel economy. I ran the TPS at 0.62v for most bikes. I've moved to the 2017+ platform so I don't have a use for this anymore. This ECU will fit 2012-2016 KTM 500 EXC/EXC-F/XCW/XCFW and 2014-2016 Husqvarna FE501 or FE501S. For some reason 500 EXC isn't available on the "fitment list", but this does fit an EXC or EXC-F. Please double check fit by part number or message me. I can guarantee fit if you message me. I have used this to run a 450 XCW and it ran ok, no flame outs, but power felt soft, like ignition timing was retarded. I wouldn't suggest using this for a 450 unless you want to make it run clean with mellow power. (I ran it back to back with a Get ECU and the GET had more power, but was not nearly as clean, the GET would flame out, stall, and had idle quality issues) I want you to be happy with your purchase, if you have any issues, please get in touch. I'll do whatever I can to solve your concerns.