The product is a set of OEM transmission gears for a Yamaha XT600 and XT600S dual sport motorcycle from the years 1990 and 1994. Manufactured by Yamaha in Japan, these vintage parts are compatible with the specified models. It is important to ensure a proper fit and functionality for your motorcycle by using genuine Yamaha parts. These gears are a reliable and authentic option for maintaining or restoring your Yamaha XT600 or XT600S from the early 1990s.