Hooah13 posted a topic in Motorcycle Jetting & Fuel InjectionI have an 03 yz250f that runs perfect when it's choked, but as soon as I unchoke it, it spits and sputters. I can give it throttle while choked, but as soon as I unchoke it and give it gas, it dies on me. This kinda came out of nowhere, as it has been running great for a long time. This problem came out of nowhere. I thought maybe it was old gas, but a new tank didn't help. I also cleaned the carb as best I could, but I really have no idea what to do when it comes to carbs. Any thoughts?