More than one manufacturer has screwed the pooch with model changes. However, consider that some, if not most, have been sales successes...the Mustang II & 3rd gen F-body come to mind, bean-counter engineered, yet they sold reasonably well for most of their model runs. I've also seen examples of vehicles that were killed-off, just when the weak points were finally eliminated...Fiero GT, anyone? What's far tougher to find is a clearcut example of an existing vehicle line that died in the showrooms due to cost-cuts. Without a complete redesign, such as with the various "C" designation Corvettes, there's rarely been a vehicle, bike or car, that wasn't well past its sales peak after a decade. And, living in big 3 land, I can say, without doubt, that manufacturers normally respond to the market. It doesn't always appear this way, at street level.
Now, having said all of that, let's consider the basic fact of CT70 sales figures. The short & skinny is that they dropped sharply beginning with the K2 and never recovered. If the lack of chrome, including folding bars & engine guard, is what sent prospective buyers heading back out through the showroom door, then why did the K3 sell in smaller numbers than the K1 & K2? After all, it had the most chrome of any model.
FYI, the commodity price of chromium went through the roof as the 1970s wore on. Automotive chrome virtually vanished because of this. Yet, the later 2nd gen F-bodies (for example) were the sales success of their decade, in spite of the fact that they were virtually all-plastic and the engines had been completely strangled by `75.
What's seems miraculous, imo, is that the CT70...essentially the product of a very different era...managed to soldier on as long as it did. Think about it, how many Woodstock-era machines, were still viable a decade later...at the end of the disco (ugh:31
era. I'm open to discussion, as always. Still, I remain convinced that North America was all but done with the CT70, after its first decade. The best stock version of the bike, the`91-94/12v model, was an abject failure in the market...continuing the downward sales trend which had begun two decades earlier, after picking it up right at the point at which it left off, in `82.