What the heck did I do wrong?
 

Ok I desided to try to make my banshee faster, so i added v-force reed, vito's power piston, coolhead w/18cc domes. Well I put it all back together and it ran great. But for some reason it doesn't seem to have as much compression as it use to. I've tried everything I could think of. The ring gap is within tolrence, I tried putting the old head back on, there wasn't any oil all the way threw on the gasket when i took it off,but I guess air might still get threw. But I still can't figure it out. So if you have any ideas as to what to check next please lrt me know!

Any help would be appreciated! Thanks!

What the heck did I do wrong?
 

When you say it does not "seem" to have as much compression..what does that mean? Did you do a compression test before and after?

What the heck did I do wrong?
 

Might check your reeds, my brother bought V force reeds for his CR250 and they cracked and chipped away after 1 ride...... they (not wanting to) sent him a new set when he sent his back.....