A biscuit shy of 1/8 ton and my stock 79 does just fine. I respect it for what it is. I tend to think the "45 HP" estimate is just that. I have a 64 horsepower bike that weighs around 400 pounds and revs to 10K rpm that does one thing for me. I have an 800 pound bike with 69 Hp that revs to 4750 rpm does another thing for me. I have a "realistic" 39Hp bike that weighs 450 pounds and revs to maybe 6K that does yet another thing for me. My XS goes to the 2 lane back roads and I casually roll around at 45-50 mph on it, sometimes with my 130 pound son on the back, and it does every last thing I expect of it for what it is. It has never felt underpowered for what my expectations are. Will it torque wheelie in 2nd gear like my SV? No. will it spin the rear tire when I whack it open in first gear from a roll, or blow down the highway at 80 mph for hours on end like my Road Star? No, but it does not fall short of my expectations for being light, quick enough, and a joy to back road on. Now, I did not buy this bike, it is an heirloom, just as my Road Star is, and even if they were not, I'd still recognize what they were made to do and respect the limitations that each style and class of power brings.
