Hey guys. Hoping everyone can give me an idea if what's happening here with my vague description.lol I've got a 2003 savage, nearly stock. The only aftermarket parts are a windshield,  the oem engine guard, skeleton hand mirrors,  saddlebags,  a tool bag on the handlebars,  a pigtail adapter, and a drivers backrest. It's got a little over 5400 miles now. I've been noticing that when I am accelerating there is a strange noise. It only happens on acceleration from 1st through 3rd gear and it's like a vibrating low pitched whistle, is about the best way to describe it. It's low enough it gets drowned out by the muffler once it gets going and it doesn't do it at all when idling or when in higher gears. If I give it any gas when idling it makes the sound though. Any ideas?

before you take off, turn around and tell her to hold on and shut up!

Last one was my first thought, but grabbing the Speedo and then the headlight, not nearly as painful