I have a couple zillas and a few trx250r's.  Had the zilla and a 250r out this morning on the frozen flat dirt fields.  The honda hooked up and hung the front tires for as long as I wanted to.  When the zilla hit the power band, the rear tires just spun.  I could not get the zilla to hook up at all.  When I rode on some rougher soil, the zilla hooked up much better but still not as good.  I am running holeshot copycats on both quads.  The zilla has elka stage 3 shocks on it and the 250r has pep zps.  Is there anything I can do to the zilla to get more traction?  It really rips and is much faster than the honda when it hooks up but when its just spinning the rear tires, the honda eats it up easily.  I am pretty sure I have the cushion lever in correctly as the bolt was up when I assembled it and it doesn't look overly high in the back. 

Makes sense. The swing arm is a stock one.  But when it hooks up that wouldn't be a good idea.  I haven't had it to the dunes yet with paddles on it but I am sure it will be fine there.  I do plan on buying some different tires one of these days.

On my CFR 450r I have OEM shocks and springs while Mt dad's CRF 250r has titanium springs on built OEM shocks. and My CRF has more traction in mud and slick surfaces while the 250 spins and falls over. I always chalked this up to the different spring materials. I could be wrong and I'm not sure what material the springs of Elka shocks are, but Its worth a look.

Could also look into the adjustment of the shock itself. Also body positioning could help as well.

Dropping the air pressure to about 2.5 psi works for me.

spring material doesn't really matter for traction, the spring rate will though.

I totally spaced it about air pressure as well. On my CRF going trail riding when its slick I have to drop the pressure just so I'm not falling all over the place. But then again ice and frozen dirt acts differently then mud.

Last year when we had snow the only issue I had on our Z400 (since the LT was not done yet) was getting high centered, we run 10" wide ITP Holeshots.

unfortunately, this has crossed my mind.  I had a banshee years ago that wouldn't hook up anywhere but the sand with paddles on it.  Still waiting on mudder nature to freeze up so I can ride again in the fields.  But the forecast is not looking good.

Different tires hole shots and knock offs are junk from my experience on the 500. My bike turns them into oiled racing slicks no matter what surface I'm on for the first 3-4 gears. I've found for wet slippery terrain a heavy 6 ply "mud" style tire hooks up good if you have 1-2 psi in them. A great hooking tire for the rear is the ohtsu mr501's which came stock on 400ex's and can still be purchased for about $150 a set and will require a 9" rim.

I do have some 400 EX rear tires and rims and I also have the proper hubs so I'm going to try those one of these days and I do like the tracks idea haha