My 03 Raptor 660 has been sputtering and the problem seems to have become very known after i changed my oil. i donno if the oil change has anything to do with it but it seems to sputter when im going up hills badly and slightly when i excelerate fast. Seems like its not getting gas or something. Does anyone know what it might be?

 

have you checked the jetting? air filter? i dont think your oil should effect your seed,etc.

 

speed. not seed