I'm looking for some honest feedback on reliability on the 450's. I am currently racing a 2004 CRF450 I bought new in late 2003. I raced it 2 classes at each event since new totalling about 60 times and practiced a lot. I had no problems until this year. I have now had to rebuild it.. as expected, piston, valve springs..., replace the rear hub -worn bolt holes, replace a bar mount that bent on an impact, stripped bolt holes in the aluminum cases-replaced with heli coil, replaced the ac pump diaphragm due to cutting out bad-fixed. I had raced a 2001 YZ250F before that for a year and a half and had no problems. I have raced 3 years now and worked up to B class. I know I have lodged a lot of time on the bike and I'm looking to get a new 450 for 2006. Maybe as soon as they come out. how has the reliability of the YZ450 been. Any thing I should be aware of. I know they detuned it for 2005. Would you choose it over the crf450? I like everything about the CRF450 except the recent money I have had to put in it. the handling, motor, and all that is awesome. I know the CRF wins the magazines shoot outs, but that rarely includes reliability issues. Would any bike be wore out based on what I have put it through? I appreciate your feedback.