I found some info that might be helpful...
Adjustment is under the left side radiator shroud using the in-line adjusters found under the left side deflector panel lid, from page 6-17 in the Honda manual.
But this entails removing all the plastic panels and the shelter to get to the adjusters.
You can check for cable play by removing the small black plastic panel on right side, and you can take out most of the slack by adding a zip tie as a temporary fix.