JT Sprockets

Online Catalogue

Honda NX 125 — Japan

1989 to 1990

Front Sprocket

Steel Front Sprocket

Part Number: JTF259

Teeth: 15

Available Sizes: 12, 13, 14, 15, 16, 17

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1250

Teeth: 48

Available Sizes: 48, 56

Drive Chain

Pitch: 428

Length: 126

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
121314151617
Rear Sprocket484.00
+25.0%
3.69
+15.4%
3.43
+7.1%
3.20
standard
3.00
-6.2%
2.82
-11.8%
564.67
+45.8%
4.31
+34.6%
4.00
+25.0%
3.73
+16.7%
3.50
+9.4%
3.29
+2.9%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)