3000 miles on the bottom end and 500 miles on the top. Have receipts for porting by SLP. 127 lbs compression on each side and runs great. $900 plus shipping form seattle.
Does not come with primary, stator, reeds, and throttle body. Can be added for extra.
Why is the compression so low? All my F/m/cfr motors pull 145+ after a rebuild. Even my 6000mile tired motor still pulled 140psi last season.
Are you using a lower compression head?
I currently have 3 of these m7 and they are all pretty much the same at any where from 122lbs to 130lbs. i'm sure you know that each gauge is different. Maybe I should buy a new one as mine is about 10 years old.