Just curious, what diagnosis and or trouble shooting have you performed up to this point in time to try and pin point, identify or remedy the buzzing, vibration unnatural vibe?
Have you adjusted your clutch and primary chain?
Have you insured that shift linkage is secure?
Have you checked EVERY possible fastener to insure none are rattling?
If I recall correctly the service manual calls for a critical fastener Check every 10k. Personally I check all the fasteners i possibly can at every oil change.
www.buellmods.com for a service manual