I recently purchased a 99 kdx200 from this kid, at least that’s what I was told when I bought it. The bike wasn’t running but supposedly only needed a piston. I started dismantling the bike to refresh the whole thing from frame paint thru final decals. When I got to the engine, things really started to indicate something was wrong. The power valve was broken and had been run for some time that way as the gears were worn down to a smooth finish. So I thought ok, no big deal, I’ll get a used one off eBay. So I did. I paid $200 for a great used one from Ireland and when it came in, that’s when I realized the kid sold me a much older engine in a 99 bike. How do I find what engine it is and from what year? I really need some help here.