JT Sprockets

Online Catalogue

KTM 990 Adventure

2005 to 2009

Front Sprocket

Steel Front Sprocket

Part Number: JTF1904

Teeth: 17

Available Sizes: 15, 16, 17

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF1904RB

Teeth: 17

Available Sizes: 16, 17

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR899

Teeth: 42

Available Sizes: 42, 45

Drive Chain

Pitch: 525

Length: 118

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
Rear Sprocket422.62

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)