JT Sprockets

Online Catalogue

Kawasaki KX125 M1

2003

Front Sprocket

Lightweight Self-Cleaning Front Sprocket

Part Number: JTF1445SC

Teeth: 13

Available Sizes: 12, 13

Steel Front Sprocket

Part Number: JTF1445

Teeth: 13 Check Availability

Available Sizes: 11, 14

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR460

Teeth: 51

Available Sizes: 39, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53

Aluminium Rear Race Sprocket

Part Number: JTA460

Teeth: 51

Available Sizes: 46, 47, 48, 49, 50, 51, 52

Drive Chain

Pitch: 520

Length: 110

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
11121314
Rear Sprocket393.55
-9.6%
3.25
-17.2%
3.00
-23.5%
2.79
-29.0%
423.82
-2.7%
3.50
-10.8%
3.23
-17.6%
3.00
-23.5%
433.91
-0.4%
3.58
-8.7%
3.31
-15.7%
3.07
-21.7%
444.00
+2.0%
3.67
-6.5%
3.38
-13.7%
3.14
-19.9%
454.09
+4.3%
3.75
-4.4%
3.46
-11.8%
3.21
-18.1%
464.18
+6.6%
3.83
-2.3%
3.54
-9.8%
3.29
-16.2%
474.27
+8.9%
3.92
-0.2%
3.62
-7.8%
3.36
-14.4%
484.36
+11.2%
4.00
+2.0%
3.69
-5.9%
3.43
-12.6%
494.45
+13.5%
4.08
+4.1%
3.77
-3.9%
3.50
-10.8%
504.55
+15.9%
4.17
+6.2%
3.85
-2.0%
3.57
-9.0%
514.64
+18.2%
4.25
+8.3%
3.92
standard
3.64
-7.1%
524.73
+20.5%
4.33
+10.5%
4.00
+2.0%
3.71
-5.3%
534.82
+22.8%
4.42
+12.6%
4.08
+3.9%
3.79
-3.5%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)