JT Sprockets

Online Catalogue

Yamaha DTR125 (DT125R)

1990 to 2003

Front Sprocket

Part Number: JTF558

Teeth: 16

Available Sizes: 13, 14, 15, 16, 17, 18, 20

Rear Sprocket

Part Number: JTR839

Teeth: 57

Available Sizes: 51, 52, 53, 55, 57

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

Full Gear Ratio Chart (pdf)

Teeth13141516171820
513.923.643.403.193.002.832.55
524.003.713.473.253.062.892.60
534.083.793.533.313.122.942.65
554.233.933.673.443.243.062.75
574.384.073.803.563.353.172.85