I finally got back to Mexico after picking up my new '06 YZ450F and took it out this morning to break it in. It's been killing me not to start it (besides at the dealer) but I didn't want to run it much before breaking in the engine. Uno) I used the mototune method of break in and the bike ran great. When I had started it at the dealer I noticed a tiny bit of oil (or whatever it is) coming out of the cylinder head breather hose and then while I was checking things out letting my bike cool down before the next breakin run, I noticed some oil on the bottom left side of engine (below where the timing plug is). I thought maybe a gasket was leaking but then when I got home and shut it off I noticed about 20-25 drips coming out of the breather hose. I searched on this and realize it's normal and it sounds like the dealer mechanic over filled something. Is this engine oil that coming out? How should I drain to the right level? 2.) I put in about an hour breaking in the motor so I'm going to do my first oil change. Is it necessary to change the filter after just an hour or can I wait until my next oil change (3 more hours). I'd do it without a thought except that I want to take the Scotts stainless out of my '04 WR450 and start using it in my YZ and my WR isn't due for another oil change for a few more hours. If it won't hurt anything I'd like to change my YZ oil without the filter, ride my WR a few times, change it's oil with a paper filter and then change my YZ oil with the Scotts stainless. Is this ok or is it really important to clean the filter after the first hour to get the metal filling out? Tres) Is there no screen inside the frame like on my WR? It sounds like I just take out the two drain bolts on the engine and then the oil filter drain bolt or entire oil filter if cleaning it. Wow, that sound easier then my WR. The carb sure doesn't though which leads me to my last question. Four) I won't ask about the popping on decel as I'll switch to 170/48 and see how that works. So #4 is actually about the stock pegs. They seem to be back compared to my WR. I'll probably get used to them and haven't jumped much but I feel like I have to lean back and straighten out my arms in order to have my weight over them and I'm not sure I wan't to be leaning back when I start breaking it in on the track. Anyone else notice this after riding a WR? Thanks guys and I did search out these topics but still need some clarity.