RMK – Supertrax Online https://www.supertraxmag.com Powersports News Mon, 17 Mar 2025 22:12:13 +0000 en-CA hourly 1 https://wordpress.org/?v=6.4.6 https://www.supertraxmag.com/wp-content/uploads/2022/06/cropped-Studio_Project-1-32x32.png RMK – Supertrax Online https://www.supertraxmag.com 32 32 2026 POLARIS SNOWMOBILE BUYER’S GUIDE https://www.supertraxmag.com/videos/2026-polaris-snowmobile-buyers-guide/ https://www.supertraxmag.com/videos/2026-polaris-snowmobile-buyers-guide/#respond Mon, 17 Mar 2025 22:12:10 +0000 https://www.supertraxmag.com/?p=16577 Luke, AJ and Mike cover the specs, details and opinions of the entire 2026 Polaris snowmobile lineup, including the NEW indy XCR 137 featuring the long-tail suspension, updates to the Voyageur line and the Switchback Assault featuring the Escape front suspension!

SNOW CHECK exclusives include your choice of:

3 Year Warranty on all Patriot engine models – or – 1.99% APR for 36 months – or – $1500 credit for PG&A

SNOW CHECK ENDS MARCH 28, 2025

Visit polaris.com/snowmobiles to build your new sled and visit your local Polaris dealership for more!

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2026 Polaris Snowmobile Lineup Reveal https://www.supertraxmag.com/videos/2026-polaris-snowmobile-lineup-reveal/ https://www.supertraxmag.com/videos/2026-polaris-snowmobile-lineup-reveal/#respond Thu, 06 Mar 2025 11:35:29 +0000 https://www.supertraxmag.com/?p=16531 The 2026 Snowmobile Lineup is here! Join members of Team Polaris athletes and product experts as they unveil what’s new for 2026.

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2023 Patriot Boost RMK Khaos Slash 155 Overview https://www.supertraxmag.com/videos/2023-patriot-boost-rmk-khaos-slash-155-overview/ https://www.supertraxmag.com/videos/2023-patriot-boost-rmk-khaos-slash-155-overview/#respond Mon, 21 Mar 2022 05:00:00 +0000 https://new.supertraxmag.com/uncategorized/2023-patriot-boost-rmk-khaos-slash-155-overview/ Luke takes a closer look at the 2023 Polaris RMK Khaos Slash 155 featuring a 155-inch track with 3-inch lug and the Patriot Boost factory 2-stroke turbocharged engine.

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Team Polaris is Geared Up for 2022 Season https://www.supertraxmag.com/press-releases/team-polaris-is-geared-up-for-2022-season/ https://www.supertraxmag.com/press-releases/team-polaris-is-geared-up-for-2022-season/#respond Fri, 13 Aug 2021 05:00:00 +0000 https://new.supertraxmag.com/uncategorized/team-polaris-is-geared-up-for-2022-season/ Success and Development in the 2020-2021 Race Season Team Polaris descended upon racetracks across the snowbelt last winter, outfitted with the best of the best built in Roseau, Minnesota.

The pandemic cut short the 2020 season, and Team Polaris racers were eager to hit the track as soon as the snow flew. Armed with new engines and technologies, Team Polaris stood proudly on the podium from Jackson Hole to ERX and Eagle River.

“Last season was a fantastic winter for Polaris. We won and had great success in every venue of snowmobile racing, with great momentum coming into this winter.” said Tom Rager Jr., Polaris Racing Manager.

The headline of the fall was the all-new 600 race engine, purpose built for the AXYS 600R SnoCross race sled. Redesigned from the ground up, the 600 twin featured an all-new throttle body EFI system, new combustion chamber, ports, and lightweight crankshaft and flywheel.

The result was a 10-horsepower gain at peak RPM, and an 18-horsepower gain in the midrange. In addition to the massive power jump, the immediate response of the engine was dramatically improved. “The racer were looking for more power, both in the holeshot and top end for longer sections of the track. The new 600 race engine really delivers that, through a lightweight, low inertia rotating assembly and an all-new EFI system.” said Darren Hedlund, Powertrain Development Specialist. The result was a true step-change in performance all the way around the track, from the hole shots to tight corners and big triples.

Team Polaris SnoCross racers had a solid start to the season, with Adam Peterson taking the opening round of Pro Lite at ERX. The opening few rounds of the season saw some early success aboard the new engine, as well as working out some year one challenges. The season finished strong, with Polaris Racers Oskar Norum and Kyle Pallin teaming up to win 3 of the final 6 Pro Finals. Polaris dominated the Pro Lite class from the first green flag drop to the final checkered, with Adam Peterson of LaVallee Racing taking the season championship, and Travis Kern of Cottew Motorsports and Carson Alread of Judnick Motorsports finishing second and third. “Adam and Travis have shown they have the speed and consistency to be in the mix in the Pro Class, and we expect them to make an immediate impact” added Rager, Jr.

The Hillclimb team took on the RMSHA circuit, picking up right where they left off last season. While the 2020 season was cut short at only 3 races, Team Polaris won all 9 King titles, sweeping every single race. “With the 2020 season being mostly cancelled, I was coming into the 2021 season with a full head of steam ready to win.” commented Keith Curtis, Polaris Racer. Expectations were high heading into the 2021 season.

The season kicked off at the Bear Lake Hillclimb with Keith Curtis sweeping every class he entered, taking home all three King titles – and eliminating any notion that the Polaris RMKs had lost a step. The domination continued with the team coming into the Jackson Hole Hillclimb on a roll. The crew delivered a knockout performance in Jackson, winning 11 of 12 Pro classes and all three King Titles.

The season wrapped up at the Lost Trail Hillclimb in Sula, Montana, and the results are simply unreal: Polaris racers won 8 Pro classes, and Keith Curtis, Luke Rainey, and Justin Thomas combined to win all 18 King titles this season. Kept under wraps throughout the race season was some exciting news: Curtis and Thomas swept the Mod King titles aboard factory-built, near production Patriot Boost engines.

The Cross-Country season was shortened due to pandemic restrictions, only running four races this season, all on frozen lakes with Ice LeMans style racing. Justin Tate took home the Pro win in round three, and Taylor Bunke and Justin Tate finished the season in 2 and 3 respectively in the Pro Championship points. “The 600 Cross Country was built specifically for hard charging cross-country racing, and our racers are really excited. We’re confident there will be a step change in performance this winter with the new sled” commented Rager, Jr. After taking the top 11 finishing positions at the 2020 SOO I-500, the 2021 race was cancelled due to the pandemic. The team will be back in action this winter in Michigan to take on the challenging 500-mile oval race with high expectations.

Blaine Stephenson has been the man to beat at the legendary Eagle River Ice Oval in recent years, going into the 2021 race with a record three World Championships in a row. The race was a wild one, and Blaine was able to prevail for a record 4 consecutive World Championship on his Champ 440 Polaris. Expectations are high heading into the race season, and the engineering team in Roseau, Minnesota has made sure that Team Polaris is equipped with the best to fight for podiums. From the continuous improvement of the 600R to the all-new Matryx Indy Cross Country and new Hillclimb engines, Team Polaris is coming out swinging this winter.

The 600R SnoCross race sled’s new race engine last year was focused on delivering more power all around the track and did just that with nearly 18 more hp in the midrange. For the 2022 600R, the engine features a variety of updates, tweaks, and improvements to improve response and durability. Updated porting, exhaust valves, and an improved ECU deliver better performance and faster response around the racetrack.

At nearly every track on the circuit, the hole shot is a crucial part of the race. While you certainly can’t win the race in the first corner, being in the front sure doesn’t hurt. To make sure the red sleds are into Turn 1 in the lead, the engineering team built an all-new rear suspension hole shot device. The mechanism holds the suspension in the optimum, compressed position for launches, then disengages and allows for full travel once the first bump is hit. The result is more consistent, immediate launches. “Being at the front in turn 1 is a huge advantage in SnoCross racing, and the 600R’s new holeshot device will give us an edge” said Ben Hayes, Racing Development Specialist. “The new suspension device will give our racers better holeshots in every class.”

After 6 seasons aboard the AXYS platform, the Cross-Country team will be piloting the all-new 600 INDY Cross Country, a factory-built race sled on the all-new Matryx platform. The Cross-Country features components and designs proven on the toughest tracks, with a heavy-duty 136” Pro-CC rear suspension, race ready bracing, PRT brakes, venting and more.

The 600 Cleanfire engine features exclusive lightweight flywheel and cup, lightweight rotating assembly, and more aggressive engine calibration. From the ditches of Minnesota to the legendary Alaskan Iron Dog, the race-team exclusive 600 Cross Country is ready. “The new Matryx platform is going to be a big upgrade on the track, with how easy it is to move around the sled” said Alex Hetteen, Polaris Racer and Powertrain Engineer. Following the exciting launch of the all-new Matryx RMK in March, the Polaris Hillclimb team is excited to send the new RMKs through the gates. “I’m super excited to get the new Matryx Slash out on the track. After seeing what it can do in the backcountry, and how precise and responsive it is, I know it will be extremely competitive on the race course” added Curtis.

The RMK Khaos Matryx Slash will challenge the 900 and 1000, with the 650 Pro RMK Matryx in the 700 class. The lightweight, rigid design of the Matryx platform RMKs are ideal stock class Hillclimb sleds, and excellent foundations for the factory-built Modified class sleds. The standard Walker Evans Velocity shocks, Polaris-exclusive tracks, and Patriot powerplants deliver the power and control required for the brutal Hillclimb courses that are commonplace on the circuit.

Beyond the new platform are two new engine packages for the season. The first is a factory-built 650 mod, built for the 700 Improved class. The engine features a revised head and calibration, as well as purpose built twin pipes, designed in Roseau, MN by the engineering team. The second is a production stock Patriot Boost engine package to compete in the new Stock Turbo class. After taking all 7 Mod King titles last season, the Patriot Boost engine is ready to defend its reign from any challengers.

No matter the venue, race circuit, or conditions, Team Polaris is ready to race when the snow flies, with the best equipment, ridden by the best racers in the business.

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Full Review of The 2020 Polaris RMK Khaos 850 https://www.supertraxmag.com/videos/full-review-of-the-2020-polaris-rmk-khaos-850/ https://www.supertraxmag.com/videos/full-review-of-the-2020-polaris-rmk-khaos-850/#respond Wed, 08 Jan 2020 08:00:00 +0000 https://new.supertraxmag.com/uncategorized/full-review-of-the-2020-polaris-rmk-khaos-850/ Luke adds some Khaos to the mix as he tries to rewrite the rules with Polaris’ newest addition to the RMK family. The question that remains to be answered? Is the Khaos the most flickable mountain sled ever built?

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5 MOUNTAIN RIDING SKILLS https://www.supertraxmag.com/videos/5-mountain-riding-skills/ https://www.supertraxmag.com/videos/5-mountain-riding-skills/#respond Mon, 08 Apr 2019 05:00:00 +0000 https://new.supertraxmag.com/uncategorized/5-mountain-riding-skills/ Worth checking out this series by Next Level Riding Clinics and Polaris sponsored Backcountry Expert Dan Adams. In this video Dan explains the 5 basic fundamentals of mountain riding.

For more info check out the Next Level Riding Clinic website at nextlevelclinics.com

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BEST 2019 MOUNTAIN SLED https://www.supertraxmag.com/features/best-2019-mountain-sled/ https://www.supertraxmag.com/features/best-2019-mountain-sled/#respond Sun, 24 Feb 2019 06:00:00 +0000 https://new.supertraxmag.com/uncategorized/best-2019-mountain-sled/ Supertrax Magazine Co-Publishers and Brothers Kent and Mark Lester are at it again bickering and arguing about their picks for the annual Supertrax Best In Class Awards!

WINNER: ARCTIC CAT ALPHA ONE

Arctic Cat has been working feverishly the past five years on its mountain program. Although the company has kept its own customers, it’s been a struggle to convert Polaris and Ski-Doo enthusiasts over to the brand.

Andy Beavis and the Arctic Cat deep snow engineering team have pared weight, streamlined suspension components so there’s little snow retention, relocated the chaincase and changed the angle of approach of the track. All these things worked and improved the M-series but nothing has made a significant dent in the competition. Not until now.

With the intro of the new Alpha One single beam skidframe, Cat may have made a quantum leap into the mindset of other-branded riders.

The Alpha skidframe goes with the principal that a deep snow skid doesn’t need two rails. Instead, there’s a single, extremely rigid rail running down the middle of the track allowing more turning flexibility from the track, quicker pivots, better sidehilling, reduced weight while still maintaining all the best of what the back of a mountain sled should do in powder.

Our mountain riders tested the Alpha One and walked away impressed. Even considering both Polaris and Ski-Doo have incredible mountain sleds with amazing technology, this one rang the bell.

Combine this tech with Cat’s very torquey, lightning responsive DSI 800 and the Alpha is a very solid contender in showrooms.

This is big progress and we believe it will turn a lot of heads in the vert market. Kudos to Cat for breaking through!

Now, listen to Mark’s feeble rebuttal on why no one else but Ski-Doo or Polaris can ever be a consideration in the mountains. Times change, buddy, and that’s what makes the snowmobile industry run!

– Kent

RUNNERS-UP: RMK 850 & SUMMIT 850

Okay Kenny, I get why you picked the new Alpha Arctic Cat. It’s whiz-bang new and captures the imagination of those who are less enlightened (than me).

Here’s the deal – it’s impossible to deny the amazing engineering, incredible mountain specific features, enormously torquey and powerful 850 engines not to mention the tested, proven, near bulletproof reliability of the Ski-Doo Summits and the RMKs.

BTW – check your Ski-Doo Summit and you’ll notice its tMotion skid allows for track flexibility in a way that’s oh-so-similar to the Alpha. Hmm?

Try this on for size – the RMK has been meticulously engineered to be super light – even lighter than the Summit and lighter than the Alpha – with or without its skid filled with snow.

Maybe Cat’s onto something here – in the meantime lets be honest, Kent. It’s going to take a lot of converted, influential mountain pilots to sign on with the new Alpha before AC will be challenging Ski-Doo or Polaris for vertical market supremacy.

– Mark

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HYPERSLED ENGINES: POLARIS CLEANFIRE 800 https://www.supertraxmag.com/features/hypersled-engines-polaris-cleanfire-800/ https://www.supertraxmag.com/features/hypersled-engines-polaris-cleanfire-800/#respond Fri, 02 Feb 2018 11:00:00 +0000 https://new.supertraxmag.com/uncategorized/hypersled-engines-polaris-cleanfire-800/ Cleanfire is the Polaris nomenclature for its Semi-Direct Injection (SDI) technology used on both its 600 and 800cc USA-built 2-stroke twins.

Semi-Direct technology has been around in the snowmobile biz since the early two-thousands and was initially offered by Ski-Doo prior to the introduction of the company’s trademark E-TEC Direct Injection.

In a 2-stroke, Direct Injection effectively seals off the bottom end from inducted oil and fuel and places the fuel injectors right in the combustion chamber, usually at the top of the piston. This is not the case with SDI. The principle behind SDI is to allow the engine to run as lean as possibly safe to deliver clean exhaust.

In a Semi-Direct Injected engine like Cleanfire, the fuel injectors are located in the boost ports and deliver gasoline to the top of the piston as crankcase pressure moves the charge up through the boost ports.

Meanwhile, oil in minimal mounts, metered by an electronic oil pump, is injected into the crankcase. Residual oil is transferred to the top of the pistons as the engine cycles so there is adequate lube for the cylinder walls and piston rings.

In order to meet EPA standards, it’s really important with an SDI engine to use a “knock” or detonation sensor. This electronic device, usually mounted on the cylinder head, “senses” an overly lean situation with the fuel-air mixture and alters engine timing to keep heat to a minimum. Today, you can drive a Cleanfire with a knock sensor and it’s so subtle you may not even know it’s working.

Cleanfire has really perfected SDI technology so it is transparent and both the 600 and 800 deliver extremely good bottom end power with incredibly crisp throttle tip-in and response. It’s no surprise they do; these engines are designed to run really lean all the time and that’s exactly what you get with a race engine.

At the same time, the crankcase is getting sufficient lubrication and is kept cool without the need for liquid-cooled cases.

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TEST RIDE: 2017 Polaris 800 PRO-RMK 174 https://www.supertraxmag.com/videos/test-ride-2017-polaris-800-pro-rmk-174/ https://www.supertraxmag.com/videos/test-ride-2017-polaris-800-pro-rmk-174/#respond Tue, 28 Feb 2017 05:00:00 +0000 https://new.supertraxmag.com/uncategorized/test-ride-2017-polaris-800-pro-rmk-174/ Luke takes the Polaris 800 PRO-RMK 174 for a rip and details his thoughts on the sled.

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2011 Assault Crossover Sled https://www.supertraxmag.com/features/2011-assault-crossover-sled/ https://www.supertraxmag.com/features/2011-assault-crossover-sled/#respond Tue, 24 Mar 2009 04:00:00 +0000 https://new.supertraxmag.com/uncategorized/2011-assault-crossover-sled/ While the 2010 Polaris RMK line-up doesn’t change much, it’s interesting to note the popular Assault can now be ordered with a 1.352″ lug track.

It’s not a factory installed option, but it does increase the versatility of the Assault as a flatland free-ride sled.

We wonder if next year it’ll get a 136″, 1.50 lug track, making it a true crossover/free-ride sled.

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