Diesel_89

Okay thanks guys, I will talk to jeff and cody again.

The domes came from FAST racing. Not sure if my cylinders have been decked.

Clean up port at the most, squish was .055

Thanks gravel for your input, zilla the snap-on gauge I used measured exactly the same as my spark plugs.

The snap-on Guage I used measures .671in and the other gauge measures .521in both read 175psi.

I traded for the bike in September, so hard to say what's all been done to it. I did forget to mention that it's plus 4° on the timing.

I'm 100 percent sure they are 21cc I just installed them Saturday morning. New to all this but do people mill cool heads?

Yes I had 20cc domes and just installed 21cc that I got from FAST. I had 190psi with the 20cc domes.

Needing advice, I have a 1996 banshee with stock stroke,stock cylinder bored 60 over,cool head with 21cc domes and .055 squish, 1000ft elevation.I have used two different compression gages and have 175psi in both cylinders.I've been running race fuel but am wanting to get back to pump gas. Everything I've read says I shouldn't have this high of compression with these mods.Any help would be greatly appreciated.