After a rebuild mine was 125 both sides. As long as its not less than about 120 and the 2 cylinders arn't more than 5 psi apart it should be good.

 

I'm going with a friend of mine to look at a 2002 ZR600 EFI in a couple of hours, the advertised milage is low so I was hoping to do a compression test - anyone know what it should read?
Also, is there anything else specific to this machine we should be looking at?

They said it was never covered when transported so there's rust under the hood - never heard of that before...[/b]

I'm gonna say anything above 120psi and you're good to go. The rust is due to salt on the roads and not washing after trailering. I had the exact same sled. Good buy

 

125-130