Yamaha R9 (2025+)
Chain Size & Slack
The Yamaha R9 (2025+) uses a 525 chain with 35–40 mm slack.
Chain Size & Slack
Chain size525
Chain links110
Chain slack35–40 mm
Chain 15-link limit239.3 mm
Drive chain slack (limit)45 mm
FAQ
What chain size is on the Yamaha R9 (2025+)?
525.
What is the specified chain slack?
35–40 mm