Originally Posted by dvldogg187
I was thinking maybe it's because I'm 6'3" 280, I kinda make a big sail, and I might throw the power to weight ratio off a little bit. Could this be the problem, is the bike to small for me? Or am I missing something.
I think you've got it scoped out pretty good. The "big sail" is more a factor than the weight.
I'm a good bit smaller than you; I have an '07 600. I expect it is roughly equivalent to your 20+ year old 700. Like you, I can get TO 70 with no problem but after that it starts to run out of HP. I'm pretty sure I could nurse it to around 90 but it would take a while. I have a windshield which no doubt helps some.
So, yes, IMHO if you need to go over 75 very often, you need to shop for a slightly bigger engine. I doubt that there is really anything "wrong" with your present ride......except that it is just old.