Hey folks, just saying hi, and hoping I can be steered in the right direction for any help with my newly obtained 1984 Yamaha Riva 180. I only know the bigger dirt bikes n street bikes. Clueless about these scooters. I need to find out where to get wire diagram or service manual downloads, as well as alternative bike swappable parts, or performance/aftermarket and or budget parts for it. Specifically carb and exhaust alternatives or mods.. Thanks a ton.