:welcome4
Welcome to our growing family of Yorkie lovers! Your Harley is just precious beyond words - that face would melt the Polar Ice Caps!!!!! She definitely looks 100% Yorkie to me. As to her size, although AKC standards state up to 7 lbs., many 100% AKC Yorkies exceed this weight.
From my limited show experience and associations with AKC conformation exhibitors and breeders, generally a "show" yorkie is square - meaning shoulder height = base of neck to base of tail length. With this said, way too many champions are so highly line bred/in bred to get these traits that negative genetic issues occur. The number of Conformation Champions with genetic disorders is disgusting.
So bottom line, Harley is beautiful - she looks 100% yorkie to me, so if she is on the larger side that just means that there is more of her to love.