The rear suspension on the challenger uses a pretty lame shock after removing them
and doing a inspection I discovered they have no rebound dampening, full details here

I noticed when my kid was riding in the back yard and going over small jumps not getting
any air but almost to the point if getting some the suspension would compress all the way 
then unload at a excessive rate (not enough spring rate, not enough rebound dampening)
so I contacted Redrider to see if he could offer a shock that I could add just to control 
dampening he sent me 2 Blistine shocks with ?? compression and ?? rebound dampening
I also had him send the adjustable spring kits in case I want to add springs to these shocks
at a later date, the hot setup would be to get springs and eliminate one or both shocks 
all together but since the spacers added to the shafts of the original shocks act as bump 
stops and limit the suspensions travel I don't see it happening.


Naturally when I went to buy longer bolts they didn't have the size I needed so I had to fabricate 
extra spacers to acomidate the longer than needed bolts, I am in the testing phase once I get
the shocks dialed in I will order the correct length bolts and pain the spacers.