Excellent Start! As someone who has been snowmobiling for 50 years, I will give you some pointers: (1) The killer of snowmobiles is weight and rust. Learn how to weld Aluminum. (2). The bogie wheels are bad. Every time you hit a bump, you hit it 24 times(each wheel). Also, Bogies have a tendency to vibrate off the track, causing snow settlement, and getting stuck. It is also more friction. Come up with a slide rail design. (3) Put sides on your track tunnel(Lawyers will get you for feet getting stuck in there), and vent the exhaust into the tunnel(it will be quieter and the track will not melt).(4) Mount your engine in front of the track so the weight is located lower. High mounted engines cause the snowmobile to be top heavy, and it won't turn as well, and the sled will capsize like a boat on deep powder. Keep Improving it, I would buy one.
I like that it is simple. I can fix it myself without sending it to a repair shop. My cars and motorcycles are all over 20 years old for the same reason.
Impressive in deep snow, that motor makes plenty of power for its purpose, mechanical disc brake is utterly reliable down to the coldest of temperatures, as long as it has a big rotor and large enough pads, power should be ok.
bogey wheel is the best way to go ..drive on anything with out worry of your sliders wearing down ..keep up your maintenence and youd be good forever just dont be dumb with it