JT Sprockets

Online Catalogue

Yamaha XS400 J,K — USA

1982 to 1983

Front Sprocket

Steel Front Sprocket

Part Number: JTF571

Teeth: 16

Available Sizes: 15, 16, 17

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR840

Teeth: 35

Available Sizes: 35, 38

Drive Chain

Pitch: 530

Length: 100

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 Sprocket352.33
+6.7%
2.19
standard
2.06
-5.9%
382.53
+15.8%
2.38
+8.6%
2.24
+2.2%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)