its defo not not brakes binding...im wondering if it could be drive bearing on where front sprockets fits..but not 100% where noise is coming from there....i stripped front sprocket off theres no play in shaft etc....i even ran the bike with out front sprocket on but no whinning noise came from it then(but there wouldnt be no load on it due chain etc being taken off)....ive even changed the rear wheel needle bearing...