JT Sprockets

Online Catalogue

Honda XR250 Tornado — Brazil

Front Sprocket

Steel Front Sprocket

Part Number: JTF1321

Teeth: 13

Available Sizes: 12, 13, 14

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF1321RB

Teeth: 13 Check Availability

Available Sizes: 14

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR251

Teeth: 38

Available Sizes: 38, 46, 47

Lightweight Self-Cleaning Rear Sprocket

Part Number: JTR251SC

Teeth: 38 Check Availability

Available Sizes: 48, 49, 50, 51

Drive Chain

Pitch: 520

Length: 104

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

TeethFront Sprocket
1314
Rear Sprocket382.92
standard
2.71
-7.1%
483.69
+26.3%
3.43
+17.3%
493.77
+28.9%
3.50
+19.7%
503.85
+31.6%
3.57
+22.2%
513.92
+34.2%
3.64
+24.6%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)