I've searched through & through my Helm's, and for some reason, can NOT find what the stock H23 compression rating is supposed to be. I'm at a fairly high altitude, in Idaho, my numbers were : 155, 150, 140, 165. Does that look alright? Is that #2 rating of 140 really low? please share some info!

 

surely someone must know...

 

nominal 185 psi, min 135 psi, and max variation of 28 psi

 

firing order for ALL hondas is 1342, so your #4 is 140, considering your altitude it looks about right