JT Sprockets

Online Catalogue

Honda C70 Z2,ZZ,C

1980 to 1982

Front Sprocket

Steel Front Sprocket

Part Number: JTF253

Teeth: 14

Available Sizes: 12, 13, 14, 15, 16, 17, 18

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR257

Teeth: 36

Available Sizes: 34, 36, 38, 39, 40, 41, 42

Drive Chain

Pitch: 420

Length: 96

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
12131415161718
Rear Sprocket342.83
+10.2%
2.62
+1.7%
2.43
-5.6%
2.27
-11.9%
2.12
-17.4%
2.00
-22.2%
1.89
-26.5%
363.00
+16.7%
2.77
+7.7%
2.57
standard
2.40
-6.7%
2.25
-12.5%
2.12
-17.6%
2.00
-22.2%
383.17
+23.1%
2.92
+13.7%
2.71
+5.6%
2.53
-1.5%
2.38
-7.6%
2.24
-13.1%
2.11
-17.9%
393.25
+26.4%
3.00
+16.7%
2.79
+8.3%
2.60
+1.1%
2.44
-5.2%
2.29
-10.8%
2.17
-15.7%
403.33
+29.6%
3.08
+19.7%
2.86
+11.1%
2.67
+3.7%
2.50
-2.8%
2.35
-8.5%
2.22
-13.6%
413.42
+32.9%
3.15
+22.6%
2.93
+13.9%
2.73
+6.3%
2.56
-0.3%
2.41
-6.2%
2.28
-11.4%
423.50
+36.1%
3.23
+25.6%
3.00
+16.7%
2.80
+8.9%
2.62
+2.1%
2.47
-3.9%
2.33
-9.3%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)