JT Sprockets

Online Catalogue

Derbi 125 Baja SM

2006 to 2008

Front Sprocket

Steel Front Sprocket

Part Number: JTF259

Teeth: 15

Available Sizes: 12, 13, 14, 15, 16, 17

12 tooth version bolt hole PCD is 30mm instead of 34mm

13 tooth version includes additional set of 2 bolt holes with 30mm PCD

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR1134

Teeth: 48

Available Sizes: 48, 50, 51, 52, 54, 56

Drive Chain

Pitch: 428

Length: 134

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
Rear Sprocket483.20

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)