do you have the OEM grips? there are a lot of options for much better grips out there. material and especially the diameter can really affect your comfort. depending on your hand size, usually the larger diameter, non round grips take a lot of stress out of your hands (so it doesn't transit up your arms.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter