I am thinking seriously about buying a clean 2005-2007 CRF 450 when and if I find the used exapmle that looks like the best bet for me. I have ridden several of late and they seem pretty good to me. I owned and raced YZ 4-strokes in my past. I know the CRFs were well received during these years, winning most shootouts and being very popular. However, I know how important buying new usually is when it comes to 4-strokes, and there are still plenty of 2009 new bikes out there still for sale for good prices. The tests of the '09 YZF claimed that they were light-feeling, had great suspension, and were easy to ride as far as the motor is concerned. So, can you guys that have owned, raced, or ridden the bikes in question tell me how they compare. My Yamahas were bulletproof and I would be comfortable with a new 450 for sure. I just don't want one if they feel heavy and bulky compared to the red bike.