Should be around 125, but, both sides should read equal, i.e. 115R 115L etc... If there is a difference between the two &/or below 100, time for rings & pistons.-Mezz
Because nobody ever has a gauge calibrated ever you shouldn't get tied up with the numbers. Comparing the numbers between the two cylinders is what you should be looking at. I see numbers (in our shop) in the 70-80 PSI range on a perfectly good running engine.
