instead of trying to get yourself introuble with power, why don't you aim for improving your skills. I have seen guys on 440's bmbarass high hp mod sleds at more than one climb. sure on a big pow day you are never gonna be the fastest or highest, but if you can carve and side hill like a machine you will be an animal when you develop your full size body.......I would go with a lighter sled and gear it down. no offense, but at 13 you can't have enough expierience to get yourself out of trouble in the mountains, and at your weight you can get into some tough places on a big gun sled.......this coming from a guy that started on a sno-tamer, before I see over the counter at the coffee shop.......more than 20 years ago.