Hi everyone, newbie here. I recently bought a 2003 Suzuki DT150 that will not run above 4800 RPM. It has plenty of power until wide open, then it hesitates and will stumble between 4600 and 4800. I have tried a lower pitch prop and got lower speed but same r's. Also the throttle valve is only open 3/4 at wide open throttle. Is this normal? Tried the sea foam shock treatment with no results. According to the engine monitor it has less than 100hours on it. Compression is near 100 and exactly the same on all six. all fuel lines look good. Thanks for any help!