If it has YZ in the name, then we're dealing with real racing bikes, and by all means, the 2002 YZ85 is one of them. A race-bred machine engineered for the youngest of riders, but derived from the top-drawer big-bore off-road bikes, the 2002 YZ85 packs an 85cc liquid-cooled 2-stroke engine, mounted in a racing-minded frame and rolling with premium Kayaba suspensions.
It may be a diminutive bike, but this one is literally loaded with first-class parts and technology, and you'd be surprised to see what it can do in the hands of the skilled young rider.