JT Sprockets

Online Catalogue

Yamaha SR250 SE

1979 to 1984

Front Sprocket

Part Number: JTF569

Teeth: 16

Available Sizes: 10, 11, 12, 13, 14, 15, 16, 17, 18

Rear Sprocket

Part Number: JTR845

Teeth: 45

Available Sizes: 40, 41, 43, 45, 46, 47, 48, 49

Drive Chain

Pitch: 520

Length: 102

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)

Teeth101112131415161718
404.003.643.333.082.862.672.502.352.22
414.103.733.423.152.932.732.562.412.28
434.303.913.583.313.072.872.692.532.39
454.504.093.753.463.213.002.812.652.50
464.604.183.833.543.293.072.882.712.56
474.704.273.923.623.363.132.942.762.61
484.804.364.003.693.433.203.002.822.67
494.904.454.083.773.503.273.062.882.72