The Yamaha 826-17682-50-00 Sprocket Drive Assembly is a hardened-steel chain-drive sprocket that transfers rotational power from the drive chain to the driven shaft in snowmobile chaincase and track drive systems. Designed for Yamaha vintage snowmobiles, it mounts in the chaincase/drivetrain housing with an approximate 15T tooth count (application dependent) and requires model-specific compatibility to ensure proper fitment. This is a Genuine Yamaha replacement component; common replacements include Yamaha 826-17682-40-00, Yamaha 810-17682-00-00, and Yamaha 853-17682-10-00.
