JT Sprockets

Online Catalogue

Kawasaki Z125 Pro (BR125) JKF,JKFA

2019

Front Sprocket

Steel Front Sprocket

Part Number: JTF1540

Teeth: 14

Available Sizes: 14

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR801

Teeth: 30

Available Sizes: 26, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54

Drive Chain

Pitch: 420

Length: 124

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
14
Rear Sprocket261.86
-13.3%
282.00
-6.7%
292.07
-3.3%
302.14
standard
312.21
+3.3%
322.29
+6.7%
332.36
+10.0%
342.43
+13.3%
352.50
+16.7%
362.57
+20.0%
372.64
+23.3%
382.71
+26.7%
392.79
+30.0%
412.93
+36.7%
423.00
+40.0%
433.07
+43.3%
443.14
+46.7%
453.21
+50.0%
463.29
+53.3%
473.36
+56.7%
483.43
+60.0%
493.50
+63.3%
503.57
+66.7%
513.64
+70.0%
523.71
+73.3%
533.79
+76.7%
543.86
+80.0%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)