JT Sprockets

Online Catalogue

Yamaha YZF R1 <<< 520 Chain Conversion

2004 to 2005

Front Sprocket

Steel Front Sprocket

Part Number: JTF1579

Teeth: 17

Available Sizes: 15, 16, 17

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR486

Teeth: 45

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

Aluminium Rear Race Sprocket

Part Number: JTA486

Teeth: 45

Available Sizes: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52

Drive Chain

Pitch: 520

Length: 116

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
151617
Rear Sprocket382.53
-4.3%
2.38
-10.3%
2.24
-15.6%
392.60
-1.8%
2.44
-7.9%
2.29
-13.3%
412.73
+3.3%
2.56
-3.2%
2.41
-8.9%
422.80
+5.8%
2.62
-0.8%
2.47
-6.7%
432.87
+8.3%
2.69
+1.5%
2.53
-4.4%
442.93
+10.8%
2.75
+3.9%
2.59
-2.2%
453.00
+13.3%
2.81
+6.2%
2.65
standard
463.07
+15.9%
2.88
+8.6%
2.71
+2.2%
473.13
+18.4%
2.94
+11.0%
2.76
+4.4%
483.20
+20.9%
3.00
+13.3%
2.82
+6.7%
493.27
+23.4%
3.06
+15.7%
2.88
+8.9%
503.33
+25.9%
3.12
+18.1%
2.94
+11.1%
513.40
+28.4%
3.19
+20.4%
3.00
+13.3%
523.47
+31.0%
3.25
+22.8%
3.06
+15.6%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)