Yamaha R9 (2025+)
Sprockets & Gearing
The Yamaha R9 (2025+) runs a 16T front sprocket and a 43T rear sprocket.
Sprockets & Gearing
Front sprocket (OEM)16TDerived from the secondary reduction ratio 2.688 (43/16) — tooth counts aren't printed as a standalone spec
Rear sprocket (OEM)43TDerived from the secondary reduction ratio 2.688 (43/16) — tooth counts aren't printed as a standalone spec
Chain size525
FAQ
What is the stock front sprocket size on the Yamaha R9 (2025+)?
16T (OEM).
What is the stock rear sprocket size?
43T (OEM).