I fitted grip puppies which made the problem worse initially & so I took them off.
After fitting the risers they went back on and they have stayed on ever since.
The crampbuster still fits on.
BTW I also find it helps to not ride too long at a steady throttle between 4-5000rpm which was the main problem area for me.
Make sure your chain is loose and tyre pressures are not too high.
Also mirrors and engine mounts are tight!
I still feel the vibration through the bars sometimes, but no numbness in the hands.
Matt Black 17 Tiger Sport - SC-Project Carbon, Radguard, Re-Trimmed seat, Fenda Extenda, 30mm Bar Risers, Puig screen deflector, Heavy bar ends, JBQ Shifter, Vario Pegs, SW Motech City Evo Tank Bag, Triumph Tankpad & Centerstand, Ventura rear rack.