Hello I’m new to the group. I recently bought a 1999 Honda foreman 400 4x4. It’s smoking a little bit out of the exhaust when I ride it. I was thinking about replacing the top end. I was wondering if I can put a top end from a 450 on it? If I can, can anyone recommend where to buy the parts? I just partially tore my Achilles so that’s the reason I’m thinking about doing it right now.