JT Sprockets

Online Catalogue

Kawasaki KZ650 SR D1 — USA

1977 to 1978

Front Sprocket

Steel Front Sprocket

Part Number: JTF513

Teeth: 16

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

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF513RB

Teeth: 16

Available Sizes: 15, 16, 17, 18

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR488

Teeth: 40

Available Sizes: 38, 39, 40, 41, 42, 43, 44, 45, 46, 47

Drive Chain

Pitch: 530

Length: 102

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
131415161718
Rear Sprocket382.92
+16.9%
2.71
+8.6%
2.53
+1.3%
2.38
-5.0%
2.24
-10.6%
2.11
-15.6%
393.00
+20.0%
2.79
+11.4%
2.60
+4.0%
2.44
-2.5%
2.29
-8.2%
2.17
-13.3%
403.08
+23.1%
2.86
+14.3%
2.67
+6.7%
2.50
standard
2.35
-5.9%
2.22
-11.1%
413.15
+26.2%
2.93
+17.1%
2.73
+9.3%
2.56
+2.5%
2.41
-3.5%
2.28
-8.9%
423.23
+29.2%
3.00
+20.0%
2.80
+12.0%
2.62
+5.0%
2.47
-1.2%
2.33
-6.7%
433.31
+32.3%
3.07
+22.9%
2.87
+14.7%
2.69
+7.5%
2.53
+1.2%
2.39
-4.4%
443.38
+35.4%
3.14
+25.7%
2.93
+17.3%
2.75
+10.0%
2.59
+3.5%
2.44
-2.2%
453.46
+38.5%
3.21
+28.6%
3.00
+20.0%
2.81
+12.5%
2.65
+5.9%
2.50
standard
463.54
+41.5%
3.29
+31.4%
3.07
+22.7%
2.88
+15.0%
2.71
+8.2%
2.56
+2.2%
473.62
+44.6%
3.36
+34.3%
3.13
+25.3%
2.94
+17.5%
2.76
+10.6%
2.61
+4.4%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)