The Crampbuster (along with the Grip Puppies) has been a big help for me.Been off forum a few days and getting caught up... surprised no one has mentioned a Crampbuster. Greatly reduces need to grip the throttle... (and the resultant tension on the muscles in your hand.) Just lay your hand on the rocker. Combined with Beemer Buddies I have no problems.
It would probably change the grip enough that it might help. Some bicycle grips have a "ledge" similar in positioning to the Crampbuster. The hands rest far flatter with them on the bicycle.can you get a benefit out of putting a Crampbuster on the left hand grip also?