JT Sprockets

Online Catalogue

Yamaha RD125 (1E7)

1975 to 1976

Front Sprocket

Part Number: JTF416

Teeth: 15

Available Sizes: 13, 14, 15

Rear Sprocket

Part Number: JTR838

Teeth: 39

Available Sizes: 31, 35, 36, 37, 38, 39, 42, 43, 45, 49

Drive Chain

Pitch: 428

Length: 114

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)

Teeth131415
312.382.212.07
352.692.502.33
362.772.572.40
372.852.642.47
382.922.712.53
393.002.792.60
423.233.002.80
433.313.072.87
453.463.213.00
493.773.503.27