It's only been about 4 times since I've ridden the 2009 CBR that I just bought but I already found some perks that bother me a bit. I'm wondering if anyone else did the similar upgrade and noticed anything difference especially with the mirror vibration and the seat height onder:. My '06 didn't vibrate as much even with the cheapo Ebay stock mirrors. Seat wise, I noticed the 09 is lower than my 06 and my friend's 07 CBR. I looked up the specification and they're all "supposedly" share the same height. I asked the original owner and he said he didn't modify anything to the bike except the spools. Any ideas?