JT Sprockets

Online Catalogue

Suzuki GSX-R250 RCH,RH,CJ,CK — Japan

1987 to 1989

Front Sprocket

Steel Front Sprocket

Part Number: JTF1439

Teeth: 13

Available Sizes: 11, 12, 13, 14, 15

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1825

Teeth: 47

Available Sizes: 37, 38, 40, 41, 42, 43, 45, 46, 47, 48

Drive Chain

Pitch: 520

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
1112131415
Rear Sprocket373.36
-7.0%
3.08
-14.7%
2.85
-21.3%
2.64
-26.9%
2.47
-31.8%
383.45
-4.4%
3.17
-12.4%
2.92
-19.1%
2.71
-24.9%
2.53
-29.9%
403.64
+0.6%
3.33
-7.8%
3.08
-14.9%
2.86
-21.0%
2.67
-26.2%
413.73
+3.1%
3.42
-5.5%
3.15
-12.8%
2.93
-19.0%
2.73
-24.4%
423.82
+5.6%
3.50
-3.2%
3.23
-10.6%
3.00
-17.0%
2.80
-22.6%
433.91
+8.1%
3.58
-0.9%
3.31
-8.5%
3.07
-15.0%
2.87
-20.7%
454.09
+13.2%
3.75
+3.7%
3.46
-4.3%
3.21
-11.1%
3.00
-17.0%
464.18
+15.7%
3.83
+6.0%
3.54
-2.1%
3.29
-9.1%
3.07
-15.2%
474.27
+18.2%
3.92
+8.3%
3.62
standard
3.36
-7.1%
3.13
-13.3%
484.36
+20.7%
4.00
+10.6%
3.69
+2.1%
3.43
-5.2%
3.20
-11.5%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)