JT Sprockets

Online Catalogue

Gas Gas 450 SM FSE

2003 to 2004

Front Sprocket

Steel Front Sprocket

Part Number: JTF715

Teeth: 13

Available Sizes: 12, 13

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR822

Teeth: 42

Available Sizes: 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53

Aluminium Rear Race Sprocket

Part Number: JTA822

Teeth: 42 Check Availability

Available Sizes: 44, 45, 48, 49, 50, 51, 52, 53

Drive Chain

Pitch: 520

Length: 112

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
1213
Rear Sprocket413.42
+5.8%
3.15
-2.4%
423.50
+8.3%
3.23
standard
433.58
+10.9%
3.31
+2.4%
443.67
+13.5%
3.38
+4.8%
453.75
+16.1%
3.46
+7.1%
463.83
+18.7%
3.54
+9.5%
473.92
+21.2%
3.62
+11.9%
484.00
+23.8%
3.69
+14.3%
494.08
+26.4%
3.77
+16.7%
504.17
+29.0%
3.85
+19.0%
514.25
+31.5%
3.92
+21.4%
524.33
+34.1%
4.00
+23.8%
534.42
+36.7%
4.08
+26.2%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)