Original Kryptonite weigh a ton Yamaha bar ends aren't just heavy to damp vibes, they also damp down bar shake (ie) tank slapper type oscillation.
I've got a set of R&G's on my 1000, filled Renthal bars with a tube of Silicone sealer, damps vibes to next to nothing, plus I always check my front wheel balance too as tyre wears... I know I'm OCD as Fook...lol...
All depends on how much vibes you're happy with really?