My buddy and myself have the same sleds. I switched over to the CE 163 track as I thought it would be much better. He was out climbing mine easily with the 5.1 track. We are very close to the same weight so something was wrong. We swapped sleds and I watched him climb with mine and the skid was not stiff enough and was bottoming out. I had set it to the max spec in the book but it was just not enough. I asked him when he came back how tight his rear shock was and he said max plus three full turns. We flipped my sled on its side and cranked in three more turns. Wow! what a difference. We are now neck and neck and it climbs like crazy. In fact it was very hard to keep the front end down when it was hooked up. We are both installing straight rails from Iceage and the fatboy springs to help both issues and prevent bottoming out the spring on the trail. My turbo kit will be here next week, but I want to go on the next trip with the engine stock to see the difference. For the hill climbers out there, add two or three extra turns into the rear shock and check out the difference. I do not think the CE track swap was worth the money right now, but maybe with the turbo put on it will be a different story. For a stock sled, keep your money.