I Believe Richard said between 14lbs. to 15lbs in another thread.
Installed mine yesterday , don't forget to put some gasket sealer on the threads of the extensions for back up to prevent fork oil leaks.
I hope it goes well for you! Those races can be a bit aggravating to knock out!
Also if you have your levers rolled forward to help you see out of your mirrors..
roll them back up to the factory spot or your gonna hit your tank when you turn your handle bars all the way , so check everything carefully!