JT Sprockets

Online Catalogue

Yamaha WR250 R-X,Y,Z,A,B,D,E,F,G,H,J (32D5/B)

2008 to 2018

Front Sprocket

Part Number: JTF1590SC

Teeth: 13

Available Sizes: 13, 14

JTF1590SC is a Lightweight Self-Cleaning sprocket

Rear Sprocket

Part Number: JTR245/2

Teeth: 43

Available Sizes: 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53

Drive Chain

Pitch: 520

Length: 108

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)

Teeth1314
382.922.71
393.002.79
403.082.86
413.152.93
423.233.00
433.313.07
443.383.14
453.463.21
463.543.29
473.623.36
483.693.43
493.773.50
503.853.57
513.923.64
524.003.71
534.083.79