JT Sprockets

Online Catalogue

Honda MT125 K1 — USA

1974 to 1976

Front Sprocket

Part Number: TBA

Teeth: 15

Available Sizes:

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR269

Teeth: 44

Available Sizes: 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 49, 50, 51, 52, 56

Drive Chain

Pitch: 428

Length: 118

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
15
Rear Sprocket342.27
-22.7%
352.33
-20.5%
362.40
-18.2%
372.47
-15.9%
382.53
-13.6%
392.60
-11.4%
402.67
-9.1%
412.73
-6.8%
422.80
-4.5%
432.87
-2.3%
442.93
standard
453.00
+2.3%
463.07
+4.5%
473.13
+6.8%
493.27
+11.4%
503.33
+13.6%
513.40
+15.9%
523.47
+18.2%
563.73
+27.3%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)