Compression testing should be done with the motor warm. Was it warm? If not you can put a bit of oil in the cylinders to simulate a warm engine. Doing a compression test on a cold motor will give false low readings.

 

+1
Take a baseline test, then add oil, if the compression improve you have a ring seal problem, if not, more a cam timing problem.
During the winter I will probably check valve timing using a modified timing wheel and a dial, I'm chasing the same gremlins.
When I bought the bike new from the dealer, people were telling me that it's the ultimate wheelie machine...yeah right, this thing have as much torque than a 600 bike and can't even race a grannie to the grocery store, still the bike feel good and I always figuers I had all the 109 hp I should have, never dynoed, just rode the thing.
Then I slapped a turbo on it and the bike woke up a lot, the bike is now picking the front wheel off the ground in second gear, witch never happened barely in first gear, maybe if I chopped the throttle first and stood on the bike.
Got to the dyno and... 112 rwhp at 4 psi (yeah I know I can increase the boost but I'm just dialing in the fuel and spark) it did not feel like a 10 hp improvement, it's way more than this, something else is dead wrong.
So I have done a leakdown test, less than 4 % on both cylinders.
Now to the dynamic compression, maybe a bunch of parts have been made off tolerance and Honda just ....
I will report results when I get enough time to do this.