JT Sprockets

Online Catalogue

BMW F800 R (JTR6.47 for 8.5mm bolts) (K73)

2009 to 2018

Front Sprocket

Steel Front Sprocket

Part Number: JTF405

Teeth: 20

Available Sizes: 19, 20

OE Type Rubber Cushioned Front Sprocket

Part Number: JTF405RB

Teeth: 20

Available Sizes: 20

Rear Sprocket

Steel Rear Sprocket

Part Number: JTR6

Teeth: 47

Available Sizes: 41, 42, 47

Drive Chain

Pitch: 525

Length: 120

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
1920
Rear Sprocket412.16
-8.2%
2.05
-12.8%
422.21
-5.9%
2.10
-10.6%
472.47
+5.3%
2.35
standard

Lower gear ratios allow for higher top speeds.

Higher gear ratios increase torque for better acceleration.

Full Gear Ratio Chart (pdf)