Hey yz shredders! Just diggin around and found these guys (Derek, super nice dude) who evaluated the popular Athena 144 Kit, Review here: http://www.hpbikes.com/news.php?id=73 and then created a better designed and better producing reliable HP144 Kit themselves. Kit is here: http://www.yzstuff.com/shop/yz125-144-big-bore-package-1-1999-current/ To ship out your whole engine and get the bottom/cylinder all built out with their 144 kit you're looking at about $1000 give or take... The kit produces substantially more HP/TQ than the athena kit due to many minor modifications that are included in the HP144 kit. Has anyone heard of or had their YZ125 built with the HP144 kit??? I think when I'm due for my next rebuild I will go this route for sure. Thanks!!!