The factory drive shaft does a zig zag thing, it is possible that the u joints being out of phase has something to do with making that work. I doubt that though.A friend told me he’s only seen them out of wack and Polaris just sticks them on any way and welds.
Interesting because unbalanced, non indexed shafts mean you need the big rubber carrier block. If you used a proper carrier bearing hard mounted it would rattle the teeth out of your head.
My 2020 rzr 900 trail has 10k miles on mix x4 and x2 and still has all original front shaft. I haven’t looked at the phase.
The dealer put U Joints in my Ranger.My Ranger driveshaft vibrated like crazy. I-joints had slop in them so I pulled it to put joints in it. Was super confused when I found the yokes welded out of phase, super disappointed too. Polaris made the driveshaft “unserviceable” as in you aren’t supposed to be able to put u-joints in it, replace the whole prop shaft. Someone sells u-joints though so I did it anyway. Still vibrated like crazy because I didn’t fix the out of phase shaft.
On my RZR, I replaced it with a CV driveshaft and it’s smooth as a 2 cyl and unbalanced 34’s can be.
Buddy broke his so nope. He was racing though.CV driveshaft from RCV and boom, no more problems.