Wow old thread revival...glad people remember how to use search haha! I just replaced the boot...it was a hell of a lot cheaper than a new top end.I was wondering if you found a solution to your boot problem? I have a 05 Firecat, and I am having the same problem with the one side being off the carb. Did you end up replacing the boot?
I had the same problem on m F7 carb. I used a heat gun, and a couple buddies to help get the boot back onto the carbs. I used gear clamps to tighten the boot on the carbs so it wouldn't come off. Definitely a pain in the ass.[
I went to Home Depot and picked up a 2" rubber fitting ($4.44) that came with two gear clamps. I cut it down to fit, and put one on each carb over lapping the existing air box. It worked great. I did have to remove the front plastic air box that connects to the hood, but all and all not too bad of a fix. Thanks for the suggestion.