Online Catalogue
Yamaha WR250 R-X,Y,Z,A,B,D,E,F,G,H,J,K,L (32D5/B)
2008 to 2020
Front Sprocket
Rear Sprocket
Steel Rear Sprocket
Part Number: JTR245/2
Teeth: 43
Available Sizes: 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53
Drive Chain
Pitch: 520
Length: 108
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 | |||
| 12 | 13 | 14 | ||
| Rear Sprocket | 43 | 3.58 +8.3% | 3.31 standard | 3.07 -7.1% |
Lower gear ratios allow for higher top speeds.
Higher gear ratios increase torque for better acceleration.
JTF1590SC is a Lightweight Self-Cleaning sprocket