talking about knee pain, my right thumb was numb after a ride of about 600+km in a day. i was wearing gloves. until now, my right thumb area near my palm still have that pins and needles feeling.
Invest in a Cramp Buster! You can relax your hand, and use your palm to throttle on. Best "mod" you can do, and cheap!
[ame=http://www.amazon.com/CrampBuster-Motorcycle-Cruise-Assist-Standard/dp/B001LRJHFK]Amazon.com: CrampBuster Motorcycle Cruise Assist - Standard/Black: Automotive[/ame]