I didn?t trust my 35 year old gauge anymore so I purchased a new one. After squirting a few drops of oil in cylinders compression came up a little, so I put about a tablespoon of oil in each one and came up to about 70 psi, I was hoping for more. This is with a fully charged battery (6 volt), all plugs removed and throttle wide open, I even tried with carb off no difference. This does have new sleeves, pistons and rings and as far as I remember when I rebuilt the engine 5 years ago everything was done by the manual specs ,( ring gap, ring displacement etc, )I appreciate the help so far and am looking for more advice in what to look for next. Dan