PROJECT UTV: Rox Speed FX Ace 570 Racer

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The Polaris Ace 570 started a new UTV revolution—or at least we hope it will kick-start a new chapter in the industry for single-seater machines. After the rise and fall of the Honda Odyssey and Pilot, some skeptics thought that a single-seat UTV platform would not rise from the ashes. However, the introduction of the Polaris Ace has proven that the genre has returned better than ever, and aftermarket companies have jumped into manufacturing performance parts for the Polaris. One of those companies is Rox Speed FX, who built this highly capable GNCC racer out of their Ace, with additions of their own design.

The Rox Ace was designed as a GNCC racing machine, so protection is important. Rox Speed FX designed a front bumper that holds a winch and front bash plate.
The Rox Ace was designed as a GNCC racing machine, so protection is important. Rox Speed FX designed a front bumper that holds a winch and front bash plate.

ROX PROTECTION
This Ace looks like a true racing machine, and it functions like one as well. The most important factor in a UTV is protection, and Rox Speed shifted into high gear to design their newest products for the single-seater. The roll cage has been redesigned to add more strength and safety. The new cage relocates the radiator behind your head to ensure more airflow to it instead of its original mounted location in the front of the machine. A quick-release net buckle system was designed into the cage, and an aluminum roof panel comes with it.

Rox Speed FX built a new rear bumper that ties into their roll cage. It protects a large amount of the rear end of the Polaris Ace.
Rox Speed FX built a new rear bumper that ties into their roll cage. It protects a large amount of the rear end of the Polaris Ace.

Since this Ace is designed to be a GNCC racer, Rox Speed FX mounted their new Trail front bumper, as well as their Sport rear bumper onto the machine. The Trail front bumper has a winch mount built into it, and Rox Speed installed a KFI winch for sticky situations. They also designed and installed a bash plate onto this racing Ace. Rox Speed FX included their new nerf bars to protect the sides of the machine from trees, rocks and other debris from getting lodged between the Polaris’ wheels. Finally, Rox Speed designed new doors and door panels for the Ace 570 with a sturdy latching system that is easy to use. When you pilot this machine, you feel a great sense of protection and safety, which is important when you’re racing door to door or simply traversing the trails with your pals.

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HANDLING UPGRADES
One of the easiest upgrades that improves handling and performance of a machine is new tires and wheels. Rox Speed decided to install a set of 14×7-inch ITP Black OPS SD dual-beadlock rims on the Ace. They clamp the 28 x 10-14 Bajacross ITP tires to the rims securely on the outside and inside tire beads, so there is absolutely no tire spin on the rim. Polaris has been using their MacPherson-style front strut suspension setup in a lot of their machines for a while now. A dual-A-arm setup allows for more customization ability to install wider arms and long-travel suspension, but the MacPherson design keeps production costs down and, in some cases, makes a machine more stable. Motowoz designed an adjustable reservoir suspension with dual-rate springs for the front and rear of the Ace that use stock parts. The MacPherson front strut is still utilized in their design, while the rear shocks are stock replacements on the dual-A-arm setup. The new front shocks by Motowoz have a dual-rate spring setup with crossover, rebound and spring preload adjustments. That is a first for the aftermarket Ace front suspension that we know of. The MacPherson struts don’t have enough room in the design to allow for all available shock adjustments, so Motowoz could only include rebound or compression adjustments. Since they designed their suspension with dual-rate springs, they went the route of having an adjustable rebound control. The rear Motowoz suspension is more adjustable with high- and lowspeed compression adjustments built into the coil-over shocks.

The Rox Ace’s Motowoz suspension makes take-offs and landings on jumps smooth. It doesn’t bounce like the stock suspension does.
The Rox Ace’s Motowoz suspension makes take-offs and landings on jumps smooth. It doesn’t bounce like the stock suspension does.

TEST RIDE
In stock form the Ace 570 has enough power to have a fun time, but the addition of an RVS Performance clutch kit helped propel the machine just as quick with the 3-inch-taller ITP tires. The kit boosts the bottom and mid-end power of the 570 engine and keep the rpm in a more usable range. The new ITP wheels and tires provide a lot more grip in all types of terrain than the stock tires did. They don’t have as much sidewall flex, they grip hard in turns, and claw through rock, mud and dirt. To help slow the machine down, DP brake pads were installed on all four corners of the racing Ace.

ITP Baja Cross tires are mounted on ITP Black OPS SD dual-beadlock rims. The tires won’t spin on the rims and will let you run on a flat tire until you can repair it
ITP Baja Cross tires are mounted on ITP Black OPS SD dual-beadlock rims. The tires won’t spin on the rims and will let you run on a flat tire until you can repair it

The Motowoz suspension made the biggest difference in the handling of the Ace 570. The adjustable suspension sucks up chop, whoops, landings, reduces roll and more with ease. The stock suspension made the Ace feel bouncy and rough, while the Motowoz setup is very smooth and improved the feel of the machine over all types of terrain. We tried airing the Ace off some natural terrain jumps, but the suspension would suck up the take-off instead of bounce the machine off it.

An RVS Performance light bar is mounted on Rox Speed FX’s Ace roll cage to brighten up the night.
An RVS Performance light bar is mounted on Rox Speed FX’s Ace roll cage to brighten up the night.

However, if it wasn’t for the Beard seat and harness system Rox installed, you wouldn’t want to drive the Ace to its new potential. Rox bolted in Beard’s High Back seat in black and orange. It’s more comfortable and holds you in place better than stock. Beard’s five-point harness belt system with soft pads keeps you planted in the seat and properly restrained for racing or rough recreational riding.

A Beard seat and harness were installed into the Ace 570 to keep the driver planted securely into the machine
A Beard seat and harness were installed into the Ace 570 to keep the driver planted securely into the machine

FINAL THOUGHTS
Rox Speed FX’s Polaris GNCCracing Ace is a whole new animal compared to the stock Ace 570. Handling on this machine is greatly improved, and the protection products that Rox Speed FX designed for it are must-haves for competition or even for hard riding. We hope to see this machine winning future races and bringing more attention to the Polaris Ace. If you want more info on Rox Speed FX products, go to www.rox speedfx.com or call (218) 451-4824.

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CONTACTS
Adrenaline Customs: 651-373-2997, www.adrenalinecustoms.com
Beard: 951-729-3320, www.beardseats.com
Blown Concepts: 612-767-7645, www.blownconcepts.com
DP Brake: www.dp-brakes.com
ITP Tires: 909-390-1905, www.itptires.com
KFI: 877-346-2050, www.kfiproducts.com
Motowoz: 763-390-9549, www.motowoz.com
Rox Speed FX: 218-326-1794, www.roxspeedfx.com
RVS Performance: 651-500-0657, www.rvsperformance.com

Rox Speed FX built nerf bars for the Ace that help protect it from trees and rocks damaging it or getting caught between the wheels.
Rox Speed FX built nerf bars for the Ace that help protect it from trees and rocks damaging it or getting caught between the wheels.

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