Well I'll help both you guys out...

Stock compression= 11.3:1
DRZ Base Gasket= 12.2:1

But!-If you take a close look at the Z base gasket, it has a spacer on each side of the gasket. If you take these spacers off...bang, you've got the dirt bike gasket exactly...

 

Ya, after looking at the base gasket its a 3 piece spring gasket you probably drill the rivet out of the piece that holds it together and have a drz base gasket but o well might as well do it right. But the guys at magic racing think that the th LTZ gaskets will give you the right compression, So any body buying a piston kit from them is being mislead I would rather deal with a company that knows what there talking about. Just call wiseco.