The Stig said:Here's a thought. Is anyone that has vibes using mineral oil in the engine?
I remember with the Blackbird I changed the oil and used fully synth. The noise from the engine and clutch basket was so bad that I dumped the fully synth and filled with semi. Problem solved.
I have no idea what the bike comes with, no idea what was put into it at first service. Might try mineral oil to see if it makes any difference. Hey, I've tried almost everything else....
I have not tried straight mineral oil, but the Kawasaki branded oil is supposed to be semi-synthetic (Motul 5100 as of last year). I was running that until my last oil change about 900 miles ago. I'm now running full synthetic, and didn't notice any difference in vibrations.
I would be shocked if the motor oil makes a difference, but it would be an inexpensive experiment.
Just this morning I was thinking my hands seem to be getting numb a little sooner than they were in recent days during my commute. I think it's caused by body position though, as I'm still getting re-accustomed to riding with both hands on the bars all the time. That, and I've been running a little higher RPM's (lower gears) than I used to as well.
Stig, did you ever collect any vibration data with your phone? I captured about 40 minutes of data at various RPM's, gears, and speeds, but still trying to process the data. I'm seeing the G-meter graph doing swings of 6 G's anytime the RPM gets above 3800, on all 3 axis. This is with the phone strapped to the top of the clutch reservoir with 3 large rubber bands.