i found my noise that sounds like sticking a piece of paper in a fan? i took my seat off gave it gas and heard it coming from the air intake hose then i took my lid off the box and gave it gas and it was louder. sounds like it is air related when i give it gas? this explains why i heard it more when going up a hill cause you are constantly on the gas. anything i can do and is this normal? thanks a lot

 

I believe it's normal, I think it's just suckin in the air because mine makes the same noise that's what it sounds like to me.

 

well if yours is doin it too hopefully its normal. thanks

 

I took my airbox lid off and rode up in the snow at about 5400 ft a couple of weekends ago.... I didn't hear any STRANGE noises, just MORE noise. Amazing how much sound comes back up out of the carb.