yeah, people here have even rode these things across several states.  Not the best bike bone stock for the slab, but you can convert to chain drive and get a ratio better for highway speeds.

Here in Montana, the speed limit on most two-lane higways is 70 mph.  I ride mine around at 75 all the time.  It just rumbles along.  I even passed a Harley today, just to be ornery.

Turns out it was a female riding the thing.  I think I pissed her off, because she tried to catch back up to me.  I couldn't let that happen.  I came smoking into a construction zone at about 80 and had to warm up the brakes a little to get legal again.  What a completely juvenile attitude on my part.  "Nah Nah Nah. My bike can pass your bike!"

But it was fun.

Yep it would be great if the jump from 4th to 5th was 1000rpm's like all the other gears.

I run at 70 almost all the time, 60-65 is the worst for vibes.

I have done 70 -75 mph for up to an hour at a time comfortably. Me and my bike seem most comfortable at around 65 mph. There seems to be a sweet spot at that speed where the vibration seems to fade away. Over all I am impressed how well the bike does on the hiway. I haven't ridden a V twin to compare the ride and sometime wonder how good they are given that I'm happy with the Savage.

I've done several comfort mods to my Sav so my comments reflect that situation. In the last couple of years I've done two 4,200 mile and one 2,700 mile round trips, in August and a great deal of the time on inter-states. The bike just rolls along with never a hesitation. Yes, the vibration can get to be a bit much, but I've run 600+ mile days and gotten up the next morning to ride again. You can do what ever you want to on these little thangs.

As for speed, I don't recommend it, but mine will sit on 85 real mph with me and a 125 or so pounds of gear on the back. And still have a little throttle left. I pass tractor trailer rigs, I run with the Sturgis crowd (until I can't take the noise anymore) and hit the gravel back roads for the hard-to-get-to places. This is my first bike ever (I'm no kid either) and I see no reason for a different steed. Well, unless it were to be a 250cc or a scooter for those pesky little under 200 mile runs where gas mileage is way better.

Jack

last month on my ride to farmington we were in a hurry to get there 75 > 80 in some streches till we hit the mountain passes..noticed more oil consumption on those higher speed legs.. on the way back (same distance diffferent roads and ALOT slower runs[bike run from durango to ouray{share the road}25 mph top for a good 50 miles but up and over 10K passes]
no oil consumed....
had er up to 88 once the first year (o6)plenty fast for this lite a scoot...

Mine is a stock 2001 and has no problems on the highway. I think she likes it better.  

60-65 mph seems to get me the best gas mileage and she seems to like to sit there comfortably although i have done 70. I'm just not a speed demon even when I had a car.