SXR Compression

This winter I added a Kommander girdled head and a wet pipe to my ski with a thicker base gasket. I ended up with 190psi in each cylinder. Is it safe to run premium gas?
 
I checked my compression with the spark plug in and gto 190 then I took the plug out and the cpmpression was the 185 range. I've been running 93 octane and it seems to be running pretty strong with no problems! I am using the timing advance that Factory Pipe included. Thanks for all your help!
 
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