just finish doing mines. tired as hell and drop a ratchet in the engine bay too. cant take it out now. the car sounds better now

 

got 80k on the clock, you guys making me wanna do it... aaaah shes been noisy a bit

 

seems like 25k would be a maximum, it always was for bikes, even though they rev even higher

 

According to Honda, the recommended interval for valve adjustment for AP1s is 105,000 miles for either normal or severe service.

I did not follow factory recommendations and found that my car benefitted (subtley) from earlier adjustment at 26k miles.