Rocket Sprockets are available for all R259 models from 1994 to 2005 for the R850 to the R1150 and the K25 R1200 models from 2004 to 2009. They are not available for the R1200 twin cam model.
The main aim for the cam sprocket tuning was to improve midrange performance and torque delivery so that part throttle response was greatly improved for better throttle response, smoother running and the ability to run in a higher gear improving fuel consumption. They do this by moving the torque peak 800 to 1000 rpm lower dependent on the model.
