2021 Ski-Doo Backcountry X-RS 154 850 E-TEC SHOT PowderMax 2.5
2021 Ski-Doo Backcountry X-RS 154 850 E-TEC SHOT PowderMax 2.5

Specs

General Information

Manufacturer
Ski-Doo
Ski-Doo
Model Year
2021
2021
Model
Backcountry X-RS 154 850 E-TEC SHOT PowderMax 2.5
Backcountry X-RS 154 850 E-TEC SHOT PowderMax 2.5
Model Code
UZMR
UZMR
Color
Ultimate Catalyst Grey / Lava Red
Ultimate Catalyst Grey / Lava Red

Dimensions

Length
Overall - 129.3 in. (3,284 mm)
Overall - 129.3 in. (3,284 mm)
Height
Overall - 50.5 in. (1,283 mm)
Overall - 50.5 in. (1,283 mm)
Width
Overall - 44.9 - 46.5 in. (1,140 - 1,180 mm)
Overall - 44.9 - 46.5 in. (1,140 - 1,180 mm)
Weight
Dry - 485 lb. (220 kg)
Dry - 485 lb. (220 kg)

Engine & Drivetrain

Engine
ROTAX 850 E-TEC, two-stoke, eRAVE™
ROTAX 850 E-TEC, two-stoke, eRAVE™
Cylinders
2
2
Cooling
Liquid
Liquid
Horsepower
165 hp@7,900 RPM
165 hp@7,900 RPM
Displacement
849 cc (51.9 ci)
849 cc (51.9 ci)
Bore x Stroke
3.2 x 3.2 in. (82 x 80.4 mm)
3.2 x 3.2 in. (82 x 80.4 mm)
Fuel System
E-TEC ® direct injection with additional booster injectors
E-TEC ® direct injection with additional booster injectors
Starting
Shot
Shot
Clutch
Engagement - 3,300 rpm
Engagement - 3,300 rpm
Drive Clutch
pDrive™ with clickers
pDrive™ with clickers
Driven Clutch
QRS
QRS
Drive Sprocket

Diameter - 7.2 in. (183 mm)

Number Of Teeth - 8

Pitch - 2.86 in. (73 mm)

Diameter - 7.2 in. (183 mm)

Number Of Teeth - 8

Pitch - 2.86 in. (73 mm)

Clutch Calibration
Sea-level
Sea-level
Reverse
RER™
RER™
Brakes
Brembo racing brake with stainless-steel braided brake line
Brembo racing brake with stainless-steel braided brake line
Fuel Type

Recommended - Premium unleaded

Minimum Octane - 91

Recommended - Premium unleaded

Minimum Octane - 91

Fuel Capacity
U.S. - 9.5 gal. (36 l)
U.S. - 9.5 gal. (36 l)
Oil Capacity
3.6 qt. (3.4 l)
3.6 qt. (3.4 l)

Operational

Platform/Frame

REV® Gen4

Bodywork - Narrow design

REV® Gen4

Bodywork - Narrow design

Handlebar

U-shaped aluminum with J-hooks / Transparent handguards

Riser block height - 4.7 in. (120 mm)

U-shaped aluminum with J-hooks / Transparent handguards

Riser block height - 4.7 in. (120 mm)

Instrumentation
7.2-in. wide digital display Gauge
7.2-in. wide digital display Gauge
Seating or Rider capacity
Trail performance
Trail performance
Skis
Pilot™ DS 2
Pilot™ DS 2
Ski Stance
38.4 or 40.2 in. (975 or 1,020 mm)
38.4 or 40.2 in. (975 or 1,020 mm)
Carbide

Configuration - 4 in. (102 mm) at 90°

Runner - Round 7/16

Configuration - 4 in. (102 mm) at 90°

Runner - Round 7/16

Track Type
PowderMax†
PowderMax†
Track LxWxH
154 x 16 x 2.5 in. (3,912 x 406 x 64 mm) opt.
154 x 16 x 2.5 in. (3,912 x 406 x 64 mm) opt.

Other

Additional Colors

Black

Ultimate Catalyst Grey / Lava Red

Black

Ultimate Catalyst Grey / Lava Red

Includes

Heated throttle lever / grips

Bumpers (Front / Rear)

Warm glove box with 4 l / 1 US gal. of storage

Open toe-hold

RS running boards

Heated throttle lever / grips

Bumpers (Front / Rear)

Warm glove box with 4 l / 1 US gal. of storage

Open toe-hold

RS running boards

Suspension

Shocks

Front - KYB† Pro 36 R Easy-Adjust

Center / Rear - KYB† Pro 40 Easy-Adjust

Front - KYB† Pro 36 R Easy-Adjust

Center / Rear - KYB† Pro 40 Easy-Adjust

Front Suspension

RAS™ 3

Max. Travel - 8.7 in. (220 mm)

RAS™ 3

Max. Travel - 8.7 in. (220 mm)

Rear Suspension

cMotion™

Max. Travel - 9.4 in. (239 mm)

cMotion™

Max. Travel - 9.4 in. (239 mm)

Features

Features

  • ROTAX 850 E-TEC ENGINE - MORE POWER YOU CAN FEEL: The most powerful 2-stroke engine in the industry.* It pumps out 10 more horsepower (165 hp) than its predecessor, but its responsiveness is what really shines. With the new pDrive primary clutch, it’s 30% quicker responding than the 800R E-TEC giving you the instant control you demand. *Observed HP measured on internal dyno test in optimal conditions for 2-stroke engines.
  • E-TEC SHOT STARTER - EASIEST STARTING: Push-button starting with almost no added weight. After an initial pull-start, the engine charges an ultracapacitor. Pushing the handlebar SHOT button for subsequent starts uses energy stored in the ultracapacitor to turn the magneto into an electric motor that rotates the flywheel, and with E-TEC technology, starts the engine. Eliminates nearly 20 lb. (9 kg) compared to conventional electric start. SHOT starting is only possible with Ski-Doo-exclusive E-TEC technology.
  • CMOTION REAR SUSPENSION - CROSSOVER CONTROL AND CARVING: Crossover-specific suspension uses best principles of the rMotion trail and tMotion deep-snow skids for confident cornering and agile boondocking – such as rigid front and rear arms with excellent weight transfer. It also features a rising-rate motion ratio, like the latest generation of Ski-Doo rear suspensions, to provide superior control and comfort. Tipped rails enable better cornering, boost top-end speed and fuel efficiency.
  • KYB PRO SHOCKS - PRO-LEVEL SHOCKS: These shocks are standard on the MXZx 600RS race sled - so you know they're extremely capable and durable for control in the toughest conditions. Remote reservoir design for performance and they are a rebuildable/revalvable. Easy Adjust compression damping knob does not require tools; rebound adjustments are standard as well.
  • RS RUNNING BOARDS - ROOM TO ROAM: Designed for aggressive stand-up riding, they are flatter for most of their length, wider and strong. Thicker aluminum sheet (3 mm vs. 1.8 mm), plus front and rear reinforcements to withstand tough landings.
  • REV Gen4 PLATFORM - NEXT GENERATION OF A LEGEND: You’ll realize the benefits of our trail and mountain teams’ close cooperation in developing this sled because it has all the right features for both types of riding. It’s incredibly responsive and agile in cornering and boondocking, thanks to its centralized masses and light weight. Not to mention the power and instant response of the 850 E-TEC engine is ideal for hammering out of corners and powering out of a hole.
  • PDRIVE CLUTCH - QUICK, EFFICIENT, EASY: A major factor in the quickness of REV sleds is the new pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% clutch. The oversize rollers with needle bearings, wide flyweights and shaft-on-shaft design emphasize smooth operation and long life. Ultra-responsive shifting, impressive RPM consistency and 2.8 lb./ 1.3 kg lighter than the TRA VII.
  • RAS 3 CROSSOVER FRONT SUSPENSION - CROSSOVER PRECISION: Similar geometry and steering to the RAS 3 mountain front end for capability and light steering feel on- and off-trail. Optimized for crossover usage, two ski stance positions dial in handling: 40.2 in. (102 cm) or 38.4 in. (97.5 cm).
  • ULTIMATE COLOR - EYE-CATCHING BODY ARMOR: Striking glossy finish with high-end protective panel wrap to resist scratches and blemishes keeps your sled looking showroom ready.

Features

  • ROTAX 850 E-TEC ENGINE - MORE POWER YOU CAN FEEL: The most powerful 2-stroke engine in the industry.* It pumps out 10 more horsepower (165 hp) than its predecessor, but its responsiveness is what really shines. With the new pDrive primary clutch, it’s 30% quicker responding than the 800R E-TEC giving you the instant control you demand. *Observed HP measured on internal dyno test in optimal conditions for 2-stroke engines.
  • E-TEC SHOT STARTER - EASIEST STARTING: Push-button starting with almost no added weight. After an initial pull-start, the engine charges an ultracapacitor. Pushing the handlebar SHOT button for subsequent starts uses energy stored in the ultracapacitor to turn the magneto into an electric motor that rotates the flywheel, and with E-TEC technology, starts the engine. Eliminates nearly 20 lb. (9 kg) compared to conventional electric start. SHOT starting is only possible with Ski-Doo-exclusive E-TEC technology.
  • CMOTION REAR SUSPENSION - CROSSOVER CONTROL AND CARVING: Crossover-specific suspension uses best principles of the rMotion trail and tMotion deep-snow skids for confident cornering and agile boondocking – such as rigid front and rear arms with excellent weight transfer. It also features a rising-rate motion ratio, like the latest generation of Ski-Doo rear suspensions, to provide superior control and comfort. Tipped rails enable better cornering, boost top-end speed and fuel efficiency.
  • KYB PRO SHOCKS - PRO-LEVEL SHOCKS: These shocks are standard on the MXZx 600RS race sled - so you know they're extremely capable and durable for control in the toughest conditions. Remote reservoir design for performance and they are a rebuildable/revalvable. Easy Adjust compression damping knob does not require tools; rebound adjustments are standard as well.
  • RS RUNNING BOARDS - ROOM TO ROAM: Designed for aggressive stand-up riding, they are flatter for most of their length, wider and strong. Thicker aluminum sheet (3 mm vs. 1.8 mm), plus front and rear reinforcements to withstand tough landings.
  • REV Gen4 PLATFORM - NEXT GENERATION OF A LEGEND: You’ll realize the benefits of our trail and mountain teams’ close cooperation in developing this sled because it has all the right features for both types of riding. It’s incredibly responsive and agile in cornering and boondocking, thanks to its centralized masses and light weight. Not to mention the power and instant response of the 850 E-TEC engine is ideal for hammering out of corners and powering out of a hole.
  • PDRIVE CLUTCH - QUICK, EFFICIENT, EASY: A major factor in the quickness of REV sleds is the new pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% clutch. The oversize rollers with needle bearings, wide flyweights and shaft-on-shaft design emphasize smooth operation and long life. Ultra-responsive shifting, impressive RPM consistency and 2.8 lb./ 1.3 kg lighter than the TRA VII.
  • RAS 3 CROSSOVER FRONT SUSPENSION - CROSSOVER PRECISION: Similar geometry and steering to the RAS 3 mountain front end for capability and light steering feel on- and off-trail. Optimized for crossover usage, two ski stance positions dial in handling: 40.2 in. (102 cm) or 38.4 in. (97.5 cm).
  • ULTIMATE COLOR - EYE-CATCHING BODY ARMOR: Striking glossy finish with high-end protective panel wrap to resist scratches and blemishes keeps your sled looking showroom ready.

Photos may show optional equipment

*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). Please print this page and present it to your saleperson, which includes all incentives, rebates, and coupons, buyer must take same day delivery by financing vehicle through dealer arranged financing. All prices are subject to change prior to written and signed agreement by all parties. Dealer fees are additional, price subject to tier 1 bank approval, not responsible for typos or incorrect information listed. Also, some finance offers may affect the price, such "either/or" ie zero percent finance OR a rebate. Promotional finance may increase price shown.