I have the RC high bars on my ten, the original end weights will fit, but you need to tap threads into the bars to screw the original end weights into. As to hand guards, I have the KTM ones which were on my old original bars, and they fit my new RC fat bar just fine, but they are plastic and have some flex, I don't know if the Yam ones will fit. Lots of info on the forum on the adventure spec bash plate, it is a great piece of kit, check here,

http://www.xt660.com/showthread.php?...ure+spec+crash

Good luck and let us know how you get on.