Buddies 13 KX250F is giving us fits. It started a month or two ago when the bike started having symptoms of running lean where the idle would hang, then fall off and the bike was hard to start. The bike needs a little bit of throttle input to get it to light up, and it wont stay running no matter where we set the idle speed screw to. The bike had low compression so we tore down the motor. Valves were smoked so picked up new valves, had the seats re-cut, put a set of rings in the motor and rebuilt. Got it fired up last night and its the same problem. Wont start unless you give it throttle, wont idle, and even when giving it throttle it dies right out after running for only a few seconds when it does fire up. Both injectors were taken out and rigged up to a can of carb cleaner spray and opened and closed with a battery on the workbench. They are both squirting fine with no odd spray patterns or anything that would suggest a clog. Fuel pressure is good. All electrical connections are greased and plugged in. I am thinking its TPS related since it wont start without throttle input. Does anyone know the stock values for the sensor? I plan on putting 5V to it later tonight and checking the values, but it would be nice to know what I am looking for. Anyone having problems with a brand new low hour 250 starting and running properly? Its frustrating to my buddy as he purchased the 13 because he was sick of working on his 07 all the time.