Hey guys, First off, I just wanted to let you know that I posed this question on the Honda forum on this site as well but would like some honest input of some Yamaha owners as well, preferably guys who have owned both, the CRF450R and the YZ450F. I currently own a 2001 CBR600F4i and a 2001 TTR125L and I'm fairly unbiased between Honda and Yamaha. I've wanted a 450 4stroke for quite some time now. I don't really care for Kawasakis and Suzukis because I don't have any experience with them, so I've done a lot of research on the YZ450F and the CRF450R. From what I've read, the YZ seems to be extremly reliable and can go a very long time before you need to worry about shimming the valves, etc. After reading about the CRF valve issues, I decided to look for a YZ450F. Problem is that most people who own dirt bikes around here don't maintain them properly and basically run them into the ground, replace the top end and repeat. I'm very picky when it comes to maintenance so I'd really like to get a new one so I don't have to worry about anything. It turns out that my local Honda dealer still has a new leftover CRF450R in stock which he is selling very cheap. I'm really really tempted to buy it, but I don't want to have to worry about the top end valve problems, because then I might as well buy a used bike and save quite a bit of money. I don't plan on racing this bike and will mainly use it to screw around off road and to practice wheelies and stoppies, etc, basically replacing my TTR. My question is, have the CRF valve issues been resolved or do these issues really only apply to bikes which are getting raced hard and/or not maintained properly? Again I don't plan on racing this bike, but it will get ridden hard every once in a while and I plan on putting many hours on it as I would ride it almost every day. I would really appreciate some honest feedback. Please post your positive and negative experiences with these bikes. Thanks in advance!