As NMK says, with threaded shock bodies like ours spring spacers won't do anything that isn't more easily done by just cranking down the threaded collar.
Thing is, for a decent ride the suspension has to be able to work both in extension as well as compression, and cranked up tight like that the shock spring unit will be basically extended already and there isn't much extending left to do.
Then when you go over a bump the spring is tight and it will jar the machine upward and when you go over a pothole the shock can't extend the wheel into the hole because it's already maxed out, so the whole machine drops down, to jar back up when you hit the other side.
I say this from experience. When I first got a set of Elkas for my quad, out of the box they were all the way loose and I spun the spring collars down down down until the ride height was what I thought was cool, and then I wondered what all the fuss was about Elka shocks, this thing rode like a tank! Are these shocks just a scam?
It wasn't until I read someone's post suggesting to take a cue from those Baja buggies, how they seemed to sit IN their suspension, not on top of it, that I understood that to work worth a darn the suspension has to have a certain amount of 'sag' in it. Those buggies drill it across all sorts of uneven ground and all four wheels are boogying up and down like jumping jacks, but the body rides more or less level.
That's what I'm going to be aiming for.
