Good question, not really thought too deep....i think if your committed to a corner (track) its probably all on the inside (not peg) outer thigh locked into the tank, very little on the bars because the lean angle is set on turn in, with centrafugal forces keeping you on the bike (100%?) Cant be much less than that when you see gp boys with elbow scraping and outer foot some times off the peg............

I cant remember feeling weighted anywhere in particular, just comfortable.........