JT Sprockets

Online Catalogue

KTM 85 SX

2018

Front Sprocket

Steel Front Sprocket

Part Number: JTF1905

Teeth: 13

Available Sizes: 13, 14

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR895

Teeth: 46

Available Sizes: 46, 49

Aluminium Rear Race Sprocket

Part Number: JTA895

Teeth: 46

Available Sizes: 46, 47, 48, 49, 50

Drive Chain

Pitch: 428

Length: 124

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

TeethFront Sprocket
1314
Rear Sprocket463.54
standard
3.29
-7.1%
473.62
+2.2%
3.36
-5.1%
483.69
+4.3%
3.43
-3.1%
493.77
+6.5%
3.50
-1.1%
503.85
+8.7%
3.57
+0.9%

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)