You need the CNC machined top yoke and the mounting kit.
Removing the old top yoke includes braking the two bolts that hold the ignition key housing (if that's what it's called ) in place.
So you need those bolts too.
Here's a pic.
The damper removes all the high speed wobles one might encounter when using the throttle hard on the road. During trackdays it's a must tool... Especially if your previous bike had one.
