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Like I said, maybe I missed something. That design looks terrible. With the shocks outbound of the cross beam you put excess leverage on that beam. Catvos should be sued for a poor design. It just looks weak in design. I apologize for indicating you installed it incorrectly.
Reread my post and I apologize I didn't mean to come off as an ass. I will agree it looks like catvos pretty much through the rear kit together overnight. It's a poor design on their half. But Kawasaki should have beefed the crossmember up anyways even if no lift at all were added. Cheap Chinese pot metal is the big issue. You add the catvos kit and it gets way worse. Some added braces from catvos that could be bolted on would more then likely fix the possible issue
 

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Looks like $275.00 a piece for new shocks from Kawasaki.
I didn't see any aftermarket ones on sale yet.
Might be able to find some from a recycled parts dealer?
 

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I tried searching around and could not find rear frame failure to be a common problem. Failure seems to come from either a poor lift design or an improperly installed lift. Has anyone else tried searching this problem?
 

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The design of relocating the shocks outside the original mount, is definitely the problem. Keep in mind All the weight of the unit, and its contents are on the shock spring setup. When you move the load support back behind the original location and just extend bolts with some plates, it is actually acting like a prybar onto the original mount. Basically intensifying the load on the original mount substantially. If you relocate the original mounting point to house the shocks back to where they extended to, it should be fine. Keep in mind that the original mount still would've had less weight , because it was more forward to throw some weight up to the front tires.
 

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Based on the pics I think I have the same lift kit as shown in the damage photos as supplied by the OP. The placement of the rear kit bracket is correct per the instructions in my kit and the forward bracket is supposed to be on the inside of the front edge of the original mount. There is supposed to be bushings that fit on the top bolts that would provide a lot of strength/support from the inside of the front aftermarket bracket to the rear original bracket. You can see the large washer on the back side of the aftermarket bracket; the bolt is quite robust and when torqued the overall assembly should be a lot stronger than the OEM set up (just as long as one or both of the bushings were not left out). If one or more of the bushings are left out the whole set up would be compromised.
I have looked mine over very closely after seeing this post and everything is perfectly straight - my kit has been on for over 400 miles of moderate to harsh use and two full moose with three to four 200 lb men have been transported out of the bush on different trips. My MBH tires are not as aggressive, I have a soft top roof and OEM springs.
Kent, if you could comment on the bushings it would be appreciated.
As for the dealer not backing you up - total BS. If you ordered the lift kit as part of the deal they should have provided you with a warranty disclaimer with the original bill of sale. If the lift kit was pre-installed by them they are totally liable since it was them who voided your warranty. If they failed to install the bushing then they are totally at fault.
Totally sucks that you are in this bind, mind you it looks like the "fix" will prevent any repeats of this issue.
 

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This is an old post but fast forward to 2020 and my un-modified late 2018 Mule with 50 hours use and no rough treatment has a bent rear support beam. Definitely a design fault. Waiting to hear back from Kawasaki Australia to see if it’s covered by warranty.
 

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This is an old post but fast forward to 2020 and my un-modified late 2018 Mule with 50 hours use and no rough treatment has a bent rear support beam. Definitely a design fault. Waiting to hear back from Kawasaki Australia to see if it’s covered by warranty.
Pictures?
 

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When you move the load support back behind the original location and just extend bolts with some plates, it is actually acting like a prybar onto the original mount.
And that's it. Cantilevering the factory mounting points is never a good idea.You would want a redesign to distribute the loading points over a wider area.
 
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