Sorry if this has been said before, but allow me to recommend the Original Grip Buddies:

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I've a had a few imitations before these, but these are the real thing, and the others pale in comparison. The Grip Buddies are well made, they are very easy to install, and they work very well. Hands and fingers are more relaxed due to the lighter pressure needed to hold the grips, and the bigger diameter, especially on the throttle side, of course. They dampen vibrations, and they are overall soft and sweet to the hands. Give them a try. And the service is A+. No, I have no vested interest in the company