
Seems odd that HD would redesign the basic frame for all there most successfull touring series to produce 2400 trikes.
I suspect the very old HD frame of more than 20 years was due a major overhaul.

Change that 20 to 30, and yes indeed the Touring frame was way past due for a major redesign. The handling had done nothing but get more and more squirrelly as the power and weight was increased over all those years, and tweaking the swing arm a couple times wasn't the answer.
Before we get all mushy and give the MoCo too much credit for
finally doing something about their obsolete frame, everyone needs to understand that other considerations were involved that probably counted more to H-D management than the improved stability. The new frame design, which uses straight pipe attached to cast corner pieces, is much easier and therefore cheaper to produce than the old bent tubing and gusset plate design, and can result in much closer tolerances in the finished product. Closer tolerances in the frame can mean reduced costs for other components that no longer have to be "adjusted" during assembly, like powertrain alignment. And having that bolt-on rear section is much cheaper than having a separate frame just for the trikes.
I think this change, unlike many of those made in the drivetrain, was a good one even if it really was driven by cost savings and not quality and performance improvement. Now if they could just find a way to eliminate the excessive weight and get these bikes under 800 pounds again, they might really have something.
Jerry