Hello guys, I'm losing my mind with my KLX250. The previous owner was clearly to harsh on her, and I'm paying all the years of bad handling. First of all, she is from 2010, EFI model, doesn't have O2 sensor (has two resistors instead of a standard eliminator kit) and doesn't have side kick sensor (the one who let's the bike to run pass 7500rpm). Because of a reason I still don't know, the piston rings got stuck on the piston grooves and the bike lost compression because of it. Some say this happens when the bike gets too hot for a long period of time, but I'm 100% sure it wasn't in the 6 months I had the bike, so I don't know... After that I changed the piston rings (piston was good, so I didn't changed it). After the repair, she started to have problems when hot starting, usually this is because of valve clearances but mechanic said he checked the valves and they were ok when he assembled the engine. This problem doesn't happen always, it seems to me that is more common when tank is almost empty (But can be coincidence). When the bike isn't going to start, the FI light flashes when I push start button (ONLY!), if I wait 5 mins, the bike starts normally (and the FI light doesn't flash). I don't know what can I do more, can it be valves? Can it be something related to injection? Can it be some electrical shenanigans? Sorry for my "Englando", I'm not a native speaker. Hope you can help me!