Polaris RZR PRO XP 4 Lone Star Racing MTS Suspension Kit
Words By: Kyle Callen
Photos By: Brandon Bunch & Elizabeth Leal
For some, the perfect car exists right off the showroom floor. Styling, power, suspension, and accessories are all that is needed. For a lot of us, that is just not the case. It would be awesome to buy a UTV from the dealership without seats, harness, cage, and sometimes suspension, but we can’t. When Polaris Industries launched the all-new RZR PRO XP, the industry was buzzing. It delivered more power, a modern, aggressive look, and a significantly better seating position. Polaris was moving in the right direction. After some seat time in both 2 and 4 seat models, the 64” stance worked okay in the rough and nasty deserts of the Southwest, but it was certainly no Turbo S. The wait for a 72” wide PRO XP has felt like waiting for a snowball fight in hell. It’s rumored, but is not confirmed.
With the need and want for a long travel PRO XP, the gents at Lone Star Racing went to work. They really felt like this was a platform that would benefit greatly from a long travel kit, and we agree. Starting with a new PRO XP chassis, the whole suspension system was re-engineered and improved all the way through the shock stroke. The task of installing all-new suspension may seem daunting, but if you take your time, it’s actually quite easy and can be done in a few days with basic hand tools in a garage. A quick note on safety, make sure your UTV is secured on jack stands that are not recalled by Harbor Freight before you begin your work.
Removal of all the old suspension is pretty straight forward—I always try to reinstall the hardware in the part coming off the chassis. If it’s not used in the new kit, then this is a great way to keep it organized and know where it goes if you ever need the part. Since you are going from 64” to 74” wide, odds are, you won’t need your factory suspension. Once the chassis is stripped bare of all suspension components, including shocks, layout the new LSR parts and make sure you have everything you need. Quick tech tip: Red Loctite and a torque wrench are your friends on this job. It is no secret that bolts come loose on UTVs all the time, even with the nyloc nuts used from the factory. As you assemble the new suspension, don’t be scared to use Red Loctite and torque the bolt to its proper specification.
The new LSR suspension bolts on just like the old stuff came apart. On our kit, we opted for the LSR axles. These axle shafts replace the stock ones. Re-using the stock CV joints, this is the most time-consuming part of the job. The AGM axle jaw tool would make your life significantly easier. Once assembled, make sure you top off the CV grease and clamp the boot tight. You can’t wash your hands enough at this point as it’s guaranteed the CV grease will find its way on to your significant other and then all over the house.
This may seem like a lot of work but the new 74” LSR long travel kit will let you smash whoops at a significantly higher pace than the stock suspension. As you are installing the new parts, you will notice the TIG-welded Chromoly tubing is a bit heavier than the stock parts. It will add some weight to the car, but personally, I would rather be heavy and strong over light and flimsy. These aren’t just stock replacements with length added behind the shock. Installing the upper shock relocator in the front proves that LSR did their homework and created the best geometry possible for the Pro XP chassis. For those saying you can’t do it better than the factory, they don’t call it the Jeep death wobble for nothin, but I digress. LSR has been around the industry for a long time and won’t build a part just to build it, the need was there to improve upon it.
Once all your bolts have thread locker applied, are properly torqued, and you are confident in the work, it’s time to pull it off the jack stands and step back to admire. The added width gives the PRO XP a much meaner stance while the better geometry and stronger components will give you the confidence to play trophy truck driver. For us in the Southwest, where there are no width restrictions (for the most part), there is no real downside to installing an LSR MTS Suspension Kit to your PRO XP. It will greatly improve the ride quality in the big bumps, and will also improve handling and stability all while adding a bit of cool factor. It will take a car that works well and make it work great. Now get out there and wrench on something.
