Not sure how to describe this. I'm getting this sort of hissing rattling noise when accelerating coming from somewhere in the front engine area, maybe even the radiator area? Kind of like a wind noise blowing through something? Sorry for the poor description. Hard to tell as it only occurs when riding and it's hard to put my head under the bike at that time. Any thoughts/suggestions on what this might be or how I can give more details to help explain better would be appreciated?