JT Sprockets

Online Catalogue

Aprilia 125 RS Extrema

1993 to 2003

Front Sprocket

Part Number: JTF394

Teeth: 17

Available Sizes: 11, 13, 14, 15, 16, 17

Rear Sprocket

Part Number: JTR701

Teeth: 41

Available Sizes: 38, 39, 40, 41, 42, 43

Drive Chain

Pitch: 520

Length: 106

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)

Teeth111314151617
383.452.922.712.532.382.24
393.553.002.792.602.442.29
403.643.082.862.672.502.35
413.733.152.932.732.562.41
423.823.233.002.802.622.47
433.913.313.072.872.692.53