M 858 MOUNTAIN CAT ALPHA ONE

$22,789

STARTING CAD*
Plus destination charge and set-up.**

**Does not include destination charge or dealer set-up fee. Taxes, levies, duties, and other government-imposed fees not included. Prices and charges are subject to change. Price shown is for base model. Accessories, kits, and configurations are extra. Additional fees and charges may apply. Dealer prices may vary. Actual selling prices and terms are set by dealers. See dealer for details.

A THRILL SEEKER’S DREAM

NEW FOR 2025

  • All New 858 C-TEC2™ Engine
  • FOX® FLOAT QS3 Shocks
  • Power Claw™ Track
  • Arctic Cat G8 Digital Display

Description

M MOUNTAIN CAT ALPHA ONE

Push the Limits

With bold styling and bolder moves, the Mountain Cat is built for next-level riding. By incorporating cutting-edge features, the Mountain Cat shows even the most diehard thrill-seekers the ride of their lives.

8 AVAILABLE / CUSTOMIZE YOUR SLED

 

146″/2.00″
154″/2.60″
154″/3.00″
165″/3.00″
PowerClaw Push Button Electric
or
Manual
AMS Skye Blue/Galaxy Blue
Track/Lug Track Type Starter Suspension Color

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A NEW BREED OF POWER

ALL NEW 858 ENGINE

The all-new 858 two-stroke engine is designed for seamless integration into the new CATALYST platform. With an 8% increase in displacement, this engine houses an 11% increase in output over the C-TEC2 800 and weighs 4% less. It features an optimized air intake system, a new exhaust valve design for more consistent power and cleaner emissions, and an all-new crankcase for increased stroke and integrated engine mounts.

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SMOOTH POWER DELIVERY

ADAPT CVT SYSTEM

With its lightweight, narrow design that increases performance and belt life, as well as the industry’s only self-adjusting clutch, the ADAPT™ CVT system provides better throttle response, smoother power delivery, and a ride like no other.

WATCH VIDEO

PEAK PERFORMANCE UNLOCKED

CATALYST CHASSIS

The revolutionary CATALYST platform has been built from the ground up to optimize every aspect of your ride, so much so that you’ll feel at one with the sled. With enhanced ergonomics, a lower center of gravity, our exclusive laydown engine design, specially calibrated suspension and more, this changes everything.

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NAVIGATION AT YOUR FINGERTIPS

ARCTIC CAT G8 DIGITAL DISPLAY

The all new Arctic Cat G8 digital display, powered by Garmin, offers seamless integration with your sled. A built in GPS with preloaded trail maps, customizable data fields and phone connectivity are just some of the features that make G8 essential for every ride. Plus, the group ride functionality utilizes satellite or celluar data, dependent on region, to share the ride with up to 15 people.

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OPTIMIZED FOR DEEP SNOW

AWS 36 FRONT SUSPENSION

The AWS 36 Front Suspension was designed specifically with the M 858 Mountain Cat in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.

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INCREASED DURABILITY

ARCTIC CAT MOUNTAIN BELT DRIVE

The CATALYST platform utilizies Arctic Cat’s belt drive system rather than a chain drive. This allows for enahnced durability and fewer parts in the system. The adjustable center distance allows for multiple ratio options and makes servicing simple.

UNPARALLELED VERSATILITY

FOX FLOAT QS3 SHOCKS

ALPHA ONE suspension is easily adjustable for ride and intensity with FOX FLOAT® shocks: from the three-position QS3 on the ski and front arm, to a semi-locking QSL on the rear, you get easy adjustability for maximum deep snow performance.

BRIGHTEN ANY RIDE

ASYMMETRICAL LED HEADLIGHT

A premium LED headlight is crucial to optimize your visibility. Equipped with both high and low-beams, this headlight casts an LED light pattern with great range and width. Plus, with its unique asymmetrical design, everyone will know that you’re on an Arctic Cat.

QUICKLY CONNECT

ATACH LATCHING SYSTEM

Adding accessories to your sled is a snap with this 4-point latching system. You can install and remove accessories in seconds, so no matter where you are, you can customize your sled with ease.

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UNMATCHED CONTROL

ALPHA ONE SINGLE-BEAM REAR SUSPENSION

Arctic Cat’s revolutionary single-beam rear suspension changes the game for mountain snowmobiles. The unique monorail design sheds snow to keep your sled light and equalizes floatation across the width of the track. ALPHA ONE offers enhanced maneuverability, giving you tighter turns than ever before.

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VEHICLE SPECS
ENGINE
M 858 MOUNTAIN CAT ALPHA ONE
Engine Type 858, 2-Stroke
Displacement (cc) 858cc
Cooling Liquid
Cylinders 2
Bore x Stroke (mm) 85 x 70 mm
Lubrication Electronic Injection
Ignition Digitally Controlled CDI
Engine Starter Output 270 W @ 3000 RPM
Fuel Delivery Next Generation C-TEC2
Exhaust APV IV w/ Full Stainless Steel Exhaust & EGT Sensors
Fuel Capacity 10.4 gal
Oil System Capacity 3.0 qt
Coolant System Capacity 4.2 qt
Minimum Octane 91
POWERTRAIN
M 858 MOUNTAIN CAT ALPHA ONE
Drive Clutch ADAPT
Driven Clutch ADAPT
Drive System AC M Belt Drive
Brakes Stealth Hydraulic Master Cylinder
Clutch Calibration 6,000-8,000 ft.
Gearing 24/63
Chain Pitch Belt
Track Drive Sprocket 9 Tooth, 2.86 Pitch, Exvolute or 7 Tooth, 3.50 Pitch, Exvolute
Reverse Push-Button Engine
SUSPENSION
M 858 MOUNTAIN CAT ALPHA ONE
Front Suspension AWS 36
Ski Shocks FOX FLOAT 3 QS3
Sway Bar N/A
Front Travel 7.6 in
Rear Suspension ALPHA ONE Rear Suspension
Front Track Shock FOX FLOAT 3 QS3
Rear Track Shock FOX FLOAT 3 QSL
Rear Travel 13.5 in, 14.5 in, or 15.5 in
DIMENSIONS
M 858 MOUNTAIN CAT ALPHA ONE
Overall Chassis Length 126.5 in or 131 in
Overall Chassis Width 42-44 in
Overall Chassis Height 50 in.
Track Type Power Claw
Track Width 15 in.
Track Length 146 in. or 154 in. or 165 in.
Lug 2.60 in. or 3.00 in.
Pitch 2.86 in. or 3.50 in.
Ski Stance 35-37 in – Adjustable
Ski Type/Width G2 ProClimb – 7 in
Runner Type Single Runner w/ Carbide
INSTRUMENTATION
M 858 MOUNTAIN CAT ALPHA ONE
Type of Gauge Arctic Cat G8 (CAN w/o GRR)
Speedometer Digital
Tachometer Digital
Odometer Digital
Fuel Digital
Oil Digital
Coolant LCD Icon
Clock Digital
Battery Voltage Digital
Altimeter Digital
Hours Digital
FEATURES
M 858 MOUNTAIN CAT ALPHA ONE
Color Skye Blue/Galaxy Blue
Heat Exchanger Front/Short Tunnel
Starter Manual or Electric Push-Button
Handlebars Hooked w/ Grab Handle
Lighting LED
Seating Mountain
Standard Accessories 12V Outlet, Sport Front Bumper, Integrated Goggle Holder, ATACH Rear Storage, Hand & Thumb Warmers, Ice Scratchers, Standard Brake Disc, Vertical Steering, Tether Switch, Visor Plug-Ins
Windshield N/A

*Vehicle specifications are subject to change.

 

*Price includes a one year warranty. Price does not include freight or set-up fees and is subject to change.

WARNING: Arctic Cat snowmobiles can be hazardous to operate. For your safety, all riders should read and understand their owner’s manual and safety instructions. Always wear an approved helmet and other safety apparel. Be aware of natural hazards you may encounter and don’t drink and ride. All scenes depicted or described were performed by professional riders under carefully controlled conditions. Never attempt to duplicate these maneuvers or encourage others to do so. Arctic Cat recommends that all operators take a safety training course. For safety and training information, please see your local dealer.