Drivetrain and brakes look original. I'm guessing that is a '87-88 R600. I'm also guessing it is a repaint (wont hurt this particular bike's value too much) by looking at the cable guides and nature of paint scratch/chip. These did have trouble with durability of paint finish but this looks like a respray. Nice bike. I'm a fan of these so it's not any stretch for me to value it a bit more than others. With that equipment, it's a sweety.