Bought a Chicago made Schwinn single speed conversion. It's been fitted with some modern components up front to which I'm simply unfamiliar with. I need to raise the handlebars. If this was an old quill stem I'd already have it done. However, since I don't know what I'm looking at, I don't know how to approach it. Will one of you good folks inform me as to what kind of set up this is, and "steer" me in the right direction for adjustment?