Wow! I had an epic battle trying to change the rear tire on my C14 yesterday. Epic! The old Roadsmarts are pretty well shot, so decided to change them out since I had the day off. My son and I changed the tires on his ZX6R a short time ago, and it was a challenge, but since it was my first time doing it myself I figured it didn't go too badly. We just used the 2x4 box and tire irons on those. I'm pretty handy with most things so I thought to myself 'how hard can it be?".
WRONG. For the life of me I couldn't get that %^$# rear tire off the rim! I got it half way off, but after fighting it for 3 hrs. I was getting mad and starting to nick up my rim, so I finally gave up and took it over to Cycle Gear. It was 110 degrees in my garage and I just couldn't git 'er done. I even stopped at one point to go inside and cool off awhile and checked out some Youtube videos on tire removal. They all made it look so easy.
The drop center of this rim doesn't seem to "drop" much, and no matter how much lubing, prying, cussing, and sweating I did, I finally just admitted defeat and threw in the towel. I hate loosing.