Online Catalogue
Yamaha YZ85 R LW
2024
Front Sprocket
Steel Front Sprocket
Part Number: JTF558
Teeth: 14
Available Sizes: 13, 14, 15, 16, 17, 18, 20
![](fileadmin/product_images/photos/small/JTF558-16 Front Sprocket 2018_09_14.jpg)
OE Type Rubber Cushioned Front Sprocket
Part Number: JTF558RB
Teeth: 14 Check Availability
Available Sizes: 16
![](fileadmin/product_images/photos/small/JTF558-16RB Front Sprocket 2020_11_13.jpg)
Rear Sprocket
Steel Rear Sprocket
Part Number: JTR798
Teeth: 51
Available Sizes: 44, 46, 47, 48, 49, 50, 51, 52, 54
![](fileadmin/product_images/photos/small/JTR798-47 Steel Sprocket 2018_07_31.jpg)
Racelite Aluminium Rear Race Sprocket
Part Number: JTA798BLK
Teeth: 51
Available Sizes: 46, 47, 48, 49, 50, 51, 52
![](fileadmin/product_images/photos/small/JTA798-52BLK Aluminium Sprocket 2021_07_20.jpg)
Please note that the chain shown in this listing is for size reference only. For the correct chain type and grade, please refer to the vehicle's manufacturer manual.
Gear Ratio Chart
Teeth | Front Sprocket |
14 | 16 |
Rear Sprocket | 51 | 3.64 standard | 3.19 -12.5% |
Lower gear ratios allow for higher top speeds.
Higher gear ratios increase torque for better acceleration.
Full Gear Ratio Chart (pdf)