If anyone in this position as the original post, Be VERY carefull, although the bike was serviced and done by a dealer, apparently, mine dropped a valve with serious repercussions. I know it didn't do a lot of K's and fortunately the rev's wasn't that high, but serious shit!
Thanks for Conrad to have saved the head, by way of sending to a engineering shop, waiting for original valves, but stainless ones!
My son had only one comment : Because it's a Honda! I refuse to believe it! The lesson here is, IF you buy a product with a cronic pain, investigate that problem to the fullest extreme, otherwise, stay away!