Bushing question

I have a 2018 570 (non-EPS) that has about 500 miles on it. I got it used so I can say how it was maintained. But the rear suspension of the bike squeaks like crazy. I tried greasing every point I could, but it didn't help at all. Is this a common thing? And does anyone make a better performing bushing set?

13′ Sportsman 500 HO Front diff cracked

Looking for some guidance. I have a 2013 Sportsman 500. The front diff cracked at the mounting bolts. :| Likely from snow plowing.

I see a new OEM is $1300. I find this a bit much. I would make this a 2wd unit before I did that. There has to be a used aftermarket option or a way to purchase a OEM housing and I can rebuild it with my guts. Anyone know of a site they can share where I can start?

TY All

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800 aftermarket work on a 700?

I believe the answer to this is yes, but would like to consult the masses. I have not found a definitive answer to this but do believe they will work. I found a big gun fuel tuner, and evo U full exhaust that was on a 06 800. Would this fit my 05 700 efi? Also the asking price is 500$, is this reasonable, the parts seem to be in good condition. this is not something i was looking for, just kind of stumbled across it and would hate to pass up a good deal for some more power.

Thanks