JT Sprockets

Online Catalogue

Yamaha YZ125 L

1984

Front Sprocket

Part Number: JTF422

Teeth: 12

Available Sizes: 12, 13, 14, 15

Rear Sprocket

Part Number: JTR853

Teeth: 50

Available Sizes: 38, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52

Aluminium Rear Sprocket

Part Number: JTA853

Teeth: 50

Available Sizes: 40, 41, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52

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

Full Gear Ratio Chart (pdf)

Teeth12131415
383.172.922.712.53
403.333.082.862.67
413.423.152.932.73
423.503.233.002.80
433.583.313.072.87
443.673.383.142.93
453.753.463.213.00
463.833.543.293.07
473.923.623.363.13
484.003.693.433.20
494.083.773.503.27
504.173.853.573.33
514.253.923.643.40
524.334.003.713.47