JT Sprockets

Online Catalogue

Kymco 110 Visa-R <<< 420 Chain Conversion — Greece / SE Asia

2012 onwards

Front Sprocket

Steel Front Sprocket

Part Number: JTF249

Teeth: 14

Available Sizes: 13, 14, 15, 16

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR257

Teeth: 36

Available Sizes: 30, 34, 36, 38, 39, 40, 41, 42

Drive Chain

Pitch: 420

Length: 108

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
13141516
Rear Sprocket302.31
-10.3%
2.14
-16.7%
2.00
-22.2%
1.88
-27.1%
342.62
+1.7%
2.43
-5.6%
2.27
-11.9%
2.12
-17.4%
362.77
+7.7%
2.57
standard
2.40
-6.7%
2.25
-12.5%
382.92
+13.7%
2.71
+5.6%
2.53
-1.5%
2.38
-7.6%
393.00
+16.7%
2.79
+8.3%
2.60
+1.1%
2.44
-5.2%
403.08
+19.7%
2.86
+11.1%
2.67
+3.7%
2.50
-2.8%
413.15
+22.6%
2.93
+13.9%
2.73
+6.3%
2.56
-0.3%
423.23
+25.6%
3.00
+16.7%
2.80
+8.9%
2.62
+2.1%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)