kx 85 vs yz 85

[pro65rider]

whats up guys. hows your day/night goin so far? i had a question. me and my son just sold the 65 and were moving to 85s. we were between a kx85 or a yz85. he's 4'9 and 85 pounds. he's a racer and i would say he's a intermediate rider. we really like the fact that the kx85 has so many parts on it and extras and that its a smaller bike.and either bike we go with we will definitely be shaving the seat so he can be flat footed on both sides.we really want more of a second opinion then facts here are the bikes were between

kx 85- http://ventura.craigslist.org/mcy/4196618830.html

other kx- http://sandiego.craigslist.org/esd/mcy/4279628287.html

yz 85-http://inlandempire.craigslist.org/mcy/4278824361.html

help us out guys! and thanks in advance