When changing plugs I checked compression and have 150 psi in both cylinders. Specs. are 165. The engine still runs great. What is the lowest advisable compression before taking action? The engine has 200 hours and 2050 miles. I service the air cleaner every trip but it still got dusted.
Would repairing to stock specs be advisable or a bigger bore kit be better?
Machine has freer exhaust and commanderV with autotune.
What say all?

Thanks,
Norm