to answer your questions. i replaced the heim joints with the trike kit having 100,000 miles on it.
new heim joints have 30,000 on them. at the same time i replace all bolts with new grade 8, and used double tooth washers plus locktite to lock them down. always had an issue with the bolts holding the heims to the rear working loose. the double tooth washers took care of that issue.
i had an issue before that the right side ladder bar was running 1/4 inch behind the left one. so i solved that.
took the trike down the road at over 100 mph and had no wiggle at all.
now after a couple of weeks its back into it again. its kinda like a reverse tank slapper.
at over 60 mph this thing will osolate 6 to 8 inches side to side. to the point if you don't slow down real quick its gonna go over.
i have been under it in the last couple of days and rechecked all bolts, all are tight.
check the distance from the rear to the front bolt holding the ladder bar in place and it reads 23 and 1/4 both sides.
checked for rear being centered, it is centered.
as far as the tires. i run 24 in the rear tires.
as far as the bags. with just me on i run them at 10 psi. with the wife on i run 23 psi.
now keep in mind these are not stock motortrike bags these are the bigger bags, but this problem existed before bag replacement.
this thing has always had a wiggle anything over 60. but fixing the ladder bar issue of the wheels running stagered cured it for awhile.
it has the new updated drive shaft. as far as the jamb nuts. yes they are lock tighted and iv;e check all of them and they are tight.
and another note. this thing will not wiggle at all with the wife and i both on.
seems it only wiggles when there no weight on the rear if that makes any sense.
i know how you feel about crazy busy.
our company just bought a bunch of used equipment. and iv'e had to order parts for every machine i pull in. but they think i shoulda had them rent ready 1/2 hour after they showed up. LOL