if it has been a proven runner, and the price is right, go for it, i got one this summer for cheap, they have there issues, but its been around and still runs good, then you will love it. they have TONS of power, and the weight thing isnt as much of a deal as people think, because of the power, sorta a lesser version of a boosted yammi. with simmons gen 1 skis the thing is cake to throw around, and i dont even have my drop brackets on it yet. the fuel consumtion is pretty dang good because of the SDI not much more than the 800 revs at all.
dont get me wrong, its a hefty sled, but i can make it work no problem at 160 loaded down with gear.
as for diet, here are some estimates, all done to mine
can-8
skis-3-4
remove swaybar-3-4
remove all foam and plastic clutch cover 2-3
rear cooler delete, 7 with the fluid removed.
tail light rack, 3ish
2 wheel kit 2-3
thats 28, low estimate, 33 if there all higher
aftermarket pipe drops another 2-3, but i just have the stock one stove paint removed heat sheild, so basically same weight.
the thing people dont seem to get is, this sled with these mods is around 10 pounds less than a stock 01 summit 800 151, we seem to forget how much weights have evolved, its really not that heavy if you look back a few years! especially not for the power it has.
honestly with different skis and a the right suspension settings, the thing is easier to throw over than a stock rev 600 144 IMO the skis really help, I also have a set of smittys drop brackets that are suposedly the ticket for these sleds, just havent gotten a chance to install it yet, after tommorow i will give you a direct comparison between it and a rev 800 151, cuz im going riding again.