I posted this in another forum and no one was of any help, so I'm bringing it here. My 02 YZ 125 has been acting funny lately. There's a slight pinging coming from the engine I haven't noticed before, and whenever you let out the clutch from neutral into first, it has a serious loss of power, like it barely goes, then after a few seconds of holding the throttle wide open, it finally kicks in and the power is dead on, is keeps doing this everytime, even after filter cleans, jetting changes. I haven't really investigated anything else, and it's Prom weekend so I don't have much time. I was hoping you guys could help so maybe I could fix this at home and not have to take it to the shop, thanks.