Physics is the same. What changes is manufacturing techniques, and ways to save weight is part of advancing technology. Ever ridden an older motorcycle? I used to own a 1992 GSXR600, and that thing was close to 500 pounds. Motorcycles generally kept getting lighter and lighter as they advanced generations, even though more weight-adding features were introduced. Why is that? Technology.
And 20 pounds doesn’t sound like a lot of weight, but it’s significant on a motorcycle. Suzuki managed to make the SV650 first two generations with an aluminum frame and keep the price just right. Then the third gen they cheaped out with a steel frame, and of course the bike gained weight. And that didn’t change with this new bike. Those 20 pounds could’ve been saved with an aluminum frame. And like mentioned earlier, adding compression adjustment to the forks and rear shock is not something that would’ve raised costs in a significant way. Suzuki had an opportunity here and they made a bike that’s gonna get lost in the competition, instead of standing out in the competition. My guess is that they’re probably struggling, and had to cut costs (like leaving MotoGP), and now have to make some money back.
They can slightly cut back on weight, but only to a certain point. Then it starts getting more expensive the lighter you get... How much of that is Physics and how much of it is profit? That's only for their accountants to know for sure. You're also mentioning that a lot of techniques to 'cheapen' the product are used as well. Gotta keep that price down somehow! And yes, I've ridden bikes from the '70s and '80s (also have an '83 Honda Shadow 750), so I'm aware of the differences. However, you don't have a 500lb bike magically weigh 350lbs today because of 'techniques and technology'. More like 470lbs, if they're lucky. For example, my Gen3 SV weighs 437lbs, roughly? An '80s Honda Nighthawk 650 with an inline-4 weighed 463lbs.
I was also going to mention to
@mad8vskillz , that the weight isn't welcome... But for riders like me, which I would think are the majority of buyers, we don't care about an extra few pounds here or there, so long as they're kept low so you don't feel it as much. The extra weight can help keep the bike stable, especially in the wind, and we'll never 'race' them. Besides, if I were serious about performance, I'd need to lose 30-50lbs MYSELF before doing it to the bike! LOL! I would imagine they also needed to axe the aluminum for rigidity for the expected added weight of newer components (and riders) for the same price.
@Skywalker67 ... That rider would be me. The SV650 was always in my list for consideration, but way down on it. Though I love it's looks, I also like the 'angular' looks of the Hornet and GSX-8S, along with the GSX-S, Kawi Z-bikes, Honda CBR-Fs, and the Yamaha MT's. The SV's price was one of the lowest, and definitely was for it's size, plus insurance costs were way lower than all of the others. But in hindsight, I'm glad it was what I ended up with! A couple of years ago, the local dealer were clearing out several Duke 790s for around the same price I paid for the SV. Was SO close to pulling the trigger, but sitting on that bike reminded me of a dirt bike. So tall and skinny, with similar-feeling bar and forks. Didn't really want that for the street, or wanted to gamble on reliability, so gave it a pass. Same with almost any Euro make, like the Aprilia Shiver. Love the looks, but I don't want any hassle. Those same reasons will probably apply to the GSX-8S vs. the Hornet/Trident.