JT Sprockets

Online Catalogue

Honda NSR50 — France

1989 to 1993

Front Sprocket

Steel Front Sprocket

Part Number: JTF251

Teeth: 15

Available Sizes: 14, 15, 16

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR216

Teeth: 36

Available Sizes: 36, 37, 40, 41, 42, 43, 45, 47

Drive Chain

Pitch: 420

Length: 122

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
141516
Rear Sprocket362.57
+7.1%
2.40
standard
2.25
-6.2%
372.64
+10.1%
2.47
+2.8%
2.31
-3.6%
402.86
+19.0%
2.67
+11.1%
2.50
+4.2%
412.93
+22.0%
2.73
+13.9%
2.56
+6.8%
423.00
+25.0%
2.80
+16.7%
2.62
+9.4%
433.07
+28.0%
2.87
+19.4%
2.69
+12.0%
453.21
+33.9%
3.00
+25.0%
2.81
+17.2%
473.36
+39.9%
3.13
+30.6%
2.94
+22.4%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)