Well, I finally found the problem & fixed it.
Turns out the throttle cables are just fine, the problem was the throttle grip sleeve! I had retrofit Valkyrie bars for a better ride position & added Kury Iso grips. Seems the combination of maybe a slightly different bar diameter combined with the severe cutting down of the stock Triumph throttle sleeve that I had to do to fit the Honda part # grips caused a warp of the sleeve. The sleeve had oblonged to the point of severe drag on the bar.
Anyways the solution was a new Valkyrie throttle sleeve which fit the Triumph perfectly & requires no chopping up to fit the Kury grip I have. :wink: Yea!!
Now I can put some miles on the brand new Rick Mayer seat I got in last week!!! 8)