Just info passed on from fellow riders, I would never own a electric start sled. I ran one in a atv, but never used it in the winter to really put it through the cold start test.
I talked to the guy at Battery World about lithium batteries. He's not a fan. Says they're just not "there" yet. Yes, they're super light, but VERY expensive. And their power curve sucks, in that they're good, good, good, dead. No warning at all. Whereas a regular AGM battery is good, good, fair, fair, low, low, dead. Said that if I really wanted one tho, he would gladly sell me one. And he went to school to learn about this stuff.Earth x, if you don't mind spending a little more and want to shed weight.
Are you guys using battery tenders? If not it is a good investment. $40 for the charger. A lot cheaper then a new battery every couple years.