hey guys. my malaguti commuter is running, but sluggish. sometimes it will start up, and then crap out once ive been giving it gas for a while. sometimes it will just start up and have no power. i have a feeling it's running lean, because if i cover up the holes on the airbox, it runs better. im new to this whole scene, so im not really sure what to do at this point. any suggestions for things i might not know to look for? thankssssss, sara.