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2021 Ski-Doo Backcountry X 850 E-TEC ES Ice Cobra 1.6
2021 Ski-Doo Backcountry X 850 E-TEC ES Ice Cobra 1.6

Specs

General Information

Manufacturer
Ski-Doo
Ski-Doo
Model Year
2021
2021
Model
Backcountry X 850 E-TEC ES Ice Cobra 1.6
Backcountry X 850 E-TEC ES Ice Cobra 1.6
Model Code
UXMS
UXMS
Color
Intense Blue / White
Intense Blue / White

Dimensions

Length
Overall - 125 in. (3,174 mm)
Overall - 125 in. (3,174 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 - 462 lb. (209 kg)
Dry - 462 lb. (209 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
Electric
Electric
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
Ski Length
Overall - 41.3 in. (1,049 mm)
Overall - 41.3 in. (1,049 mm)
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 - Square 3/8

Configuration - 4 in. (102 mm) at 90°

Runner - Square 3/8

Track Type
Ice Cobra
Ice Cobra
Track LxWxH
146 x 15 x 1.6 in. (3,705 x 381 x 41 mm) opt.
146 x 15 x 1.6 in. (3,705 x 381 x 41 mm) opt.

Other

Additional Colors

Black

Intense Blue / White

Black

Intense Blue / White

Includes

Heated throttle lever / grips

Windshield - 14 in. (360 mm)

Bumpers (Front / Rear)

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

Open toe-hold

Improved deep snow running boards with large openings

Heated throttle lever / grips

Windshield - 14 in. (360 mm)

Bumpers (Front / Rear)

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

Open toe-hold

Improved deep snow running boards with large openings

Suspension

Shocks

Front / Center - HPG™ Plus

Rear - KYB† Pro 36 Easy-Adjust

Front / Center - HPG™ Plus

Rear - KYB† Pro 36 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.
  • PDRIVE CLUTCH - QUICK, EFFICIENT, EASY: A major factor in the quickness of REV Gen4 sleds is the new pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% new 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.
  • 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.
  • CMOTION REAR SUSPENSION - CROSSOVER CONTROL AND CARVING: Crossover-specific suspension uses best principles of the rMotion trail and tMotion mountain 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.
  • RAS 3 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: 40.1 in. (102 cm) or 38.4 in. (97.5 cm).
  • RUNNING BOARDS WITH LARGE OPENINGS - ALL CLEAR: Massive, strategically shaped openings keep the boards clear. A tall extruded edge adds stiffness and has aggressive boot grips.
  • KYB PRO 36 REAR SHOCK - RACE-PROVEN CAPABILITY: Race-proven aluminum shock with no-tool compression damping adjustment. Rebuildable/revalvable design.

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.
  • PDRIVE CLUTCH - QUICK, EFFICIENT, EASY: A major factor in the quickness of REV Gen4 sleds is the new pDrive clutch. Fast and friction-free dual rollers transfer torque in place of traditional sliding buttons on this 100% new 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.
  • 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.
  • CMOTION REAR SUSPENSION - CROSSOVER CONTROL AND CARVING: Crossover-specific suspension uses best principles of the rMotion trail and tMotion mountain 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.
  • RAS 3 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: 40.1 in. (102 cm) or 38.4 in. (97.5 cm).
  • RUNNING BOARDS WITH LARGE OPENINGS - ALL CLEAR: Massive, strategically shaped openings keep the boards clear. A tall extruded edge adds stiffness and has aggressive boot grips.
  • KYB PRO 36 REAR SHOCK - RACE-PROVEN CAPABILITY: Race-proven aluminum shock with no-tool compression damping adjustment. Rebuildable/revalvable design.