The purpose of the deep snow kit wasn't to raise the tunnel. What it did was put the pivot point of the rear swing arm farther forward. This gave the rider more leverage over the back end to lighten the front and get the skis to ride on top of the snow. If you don't plan on riding in a lot of deep powder, I wouldn't make the change. It won't make a large difference anyway since you will be mainly limited by the short lug track. A taller lug track conversion would help much more. It does nothing for trail riding except make the rear suspension bottom out more. I actually put it back to factory after trying it.
thanks for the info. I'm heading out to the rockies to do a little riding and have been debating what to take for sleds. I finally came to the conclusion that i'm just riding a sprintfire, trailfire and sportfire and sticking to the trails. I really don't need a sore back from constantly picking the sleds up out of deep powder all weekend! I thought about renting a couple 2014 mountain arctic cats but that would've ran me around $800 for a couple of days. I'm pretty sure i'm just going to keep heading up to Minnesota and Wisconsin in the future and keeping my old deeres.
If you are staying on the groomed trails, you will be fine without it. If you venture off the trail, you will be in a world of hurt anyway. When I lived in Southwest Colorado, I rode an Arctic Cat Mountain Cat with a 162" track with 3" paddles and still managed to get buried in deep powder. I would just correct your jetting, and enjoy the old Deeres out there. Where abouts will you be riding?
We're not exactly sure just yet. I think we're going to be in the Winter Park/Breckenridge area just west of Denver. We've never been out there and have no idea where to go or what to expect. It will be myself and my two oldest kids that are 19 and 12, neither of which have any experience riding so i'm sure we don't need to be going off of the trails anyway. Do you have any recommendations?