Slipping clutch at high throttle
 

I have a 2001 Bayou 300 4x4 that started slipping in the upper gears, and at high throttle. The shifting clutches, and plates look great, the primary on the other hand looks questionable. I've already ordered the primary clutch parts,
https://cimg6.ibsrv.net/gimg/www.kaw...568b0eb526.jpg
This is about how all of them look, chips here and there.
https://cimg6.ibsrv.net/gimg/www.kaw...a9385ca543.jpg
https://cimg7.ibsrv.net/gimg/www.kaw...f1445cc4b1.jpg
going with my gut, but I wanted to get a second opinion.