Hi guys,

I'm looking to change my worn out 09 F650GS sprockets. Should I stick with stock size or go for something different? Looking for better overall performance (mileage). My options are below.

FRONT SPROCKET SIZE
15T
16T
17T - Stock Size
18T

REAR SPROCKET SIZE
41T - Stock Size
42T
43T
47T

Any suggestions would be appreciated. Thx.