Replaced some springs with extras I had from a snowmobile build.  Noise is gone.  Springs were thicker in diameter and shorter in length

500 miles on machine. 
Will most shops rebuild these cfmoto branded shocks?

18 zf800trail.  Just trying to decide which route to go?  Do the springs make that much difference?

No popping on decel.  It runs great after a minute or two. 

2018zf800trail.
The previous weekend I did a 100+ mile trip and the machine ran great.   I went to load it on the trailer this past Saturday and it was really loud.  Like it had straight pipes.  I did see a lot of dust blowing over the rear driver side tire. After about a minute or so it was quiet again.  So I loaded and went riding.  Same thing happened and while it was loud I did get one backfire upon acceleration.   After a minute or so it was quiet and ran great for the day.  Got home and same thing.  I took off one heat shield and all my springs are there.  No visible exhaust leak.  Couldn't tell if the valves were noisy or not. 
Any ideas?

End of the day I ended up running all three, 1.5 spacers, 1.5 lift and up two sizes in tires.  Springs have just enough pre-load to keep springs in place when unloaded.  Still playing with the shock adjustments. 

Trail model

What would be better?  1.5 " lift or going up two sizes on the tires.   Currently have the lift installed and tires on the way.  Thinking about removing the lift and just using bigger tires.  I know I could run both but it is not what I am asking. 
Thoughts?

I remember reading that I need to install wheel spacers with a 2" lift.  I can't find what size?  Does anybody know?

It's a 2500 silverado diesel that is the tow vehicle.  I was originally thinking enclosed so I could use it for storage.   I think i will be going steel open.. yes they can rust but aluminum will pit.  Only advantage of aluminum I see is lighter weight. 

Any pics of them loaded?

Looking at two types of trailers, 6/7x14 open aluminum and 6x10 steel frame enclosed.  The enclosed is $500 to $1000 more.  Having a tough time deciding between the two.  Obviously they each have benefits.   What would you choose and why?

high light the whole link and put it in a google search
https://youtu.be/z
dVtVrNZn4w

https://youtu.be/z
dVtVrNZn4w

So a trail and 53 are the same widths?