2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6

Skye Blue / Galaxy BlueNew Snowmobiles

MSRP

$18,599

2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 1
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 2
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 3
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 4
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 5
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 6
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 7
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 8
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 9
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 10
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 11
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2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 1
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 2
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 3
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 4
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 5
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 6
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 7
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 8
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 9
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 10
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 11
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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.
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2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6

Condition
New
Category
Snowmobiles
Model Type
Mountain
Model Code
S2025CMJIJUSL
Color
Skye Blue / Galaxy Blue

Features

  • A BREED OF POWER - ALL 858 ENGINE: The 858 two-stroke engine is designed for seamless integration into the 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 exhaust valve design for more consistent power and cleaner emissions, and a crankcase for increased stroke and integrated engine mounts.
  • 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.
  • NAVIGATION AT YOUR FINGERTIPS - ARCTIC CAT G8 DIGITAL DISPLAY: The 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.

General Information

Manufacturer
Arctic Cat
Model Year
2025
Model
M 858 Mountain Cat Alpha One 146 2.6
Model Code
S2025CMJIJUSL
Color
Skye Blue / Galaxy Blue

Dimensions

Length
Overall chassis - 126.5 in.
Height
Overall chassis - 50 in.
Width
Overall chassis - 42 - 44 in.

Engine & Drivetrain

Engine
858, 2-Stroke
Cylinders
2
Cooling

Liquid

Coolant System Capacity - 4.2 qt.

Front / Short tunnel heat exchanger

Displacement
858 cc
Bore x Stroke
3.3 x 3 in. (85 x 75.6 mm)
Fuel System
Next Gen. C-TEC2
Starting
Manual
Ignition

Digitally Controlled CDI

Engine Stator Output - 270W @ 3,000 rpm

Lubrication
Electronic Injection
Drive System
AC M Belt Drive
Drive Clutch
ADAPT
Driven Clutch
ADAPT
Drive Sprocket
9 Tooth, 2.86 Pitch, Exvolute
Clutch Calibration
6,000 - 8,000 ft.
Reverse
Push-Button Engine
Transmission

Gearing - 24 / 63

Chain pitch - Belt

Exhaust
APV IV with Full Stainless Steel Exhaust and EGT Sensors
Brakes

Disc

Stealth Hydraulic Master Cylinder

Fuel Type
Minimum Octane - 91
Fuel Capacity
10.4 gal.
Oil Capacity
3.0 qt.

Operational

Handlebar
Hooked with grab handle
Instrumentation

Arctic Cat G8 (CAN without GRR) gauge

Speedometer, tachometer, odometer, fuel, oil, clock, battery voltage, altimeter and hours - Digital

Coolant - LCD Icon

Seating or Rider capacity
Mountain
Skis

Type - G2 ProClimb

Width - 7 in.

Ski Stance
35 - 37 in. adjustable
Carbide
Runner type - Single runner with Carbide
Track Type
PowerClaw
Track LxWxH
146 x 15 x 2.60 in.
Pitch
2.86 in.

Other

Includes
12V Outlet, Integrated Goggle Holder, ATACH Rear Storage, Hand and Thumb Warmers, Ice Scratchers, Vertical Steering, Tether Switch, Visor Plug-Ins
Safety Features

Lighting - LED

Sport Front Bumper

Warranty
Factory - 12 months (In-season), 24 months (Pre-order)

Suspension

Shocks

Ski / Front Track - FOX FLOAT 3 QS3

Rear Track - FOX FLOAT 3 QSL

Front Suspension

AWS 36

Travel - 7.6 in.

Rear Suspension

ALPHA ONE

Travel - 13.5 in.

Gallery

2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 1
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 2
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 3
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 4
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 5
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 6
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 7
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 8
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 9
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 10
2025 Arctic Cat M 858 Mountain Cat Alpha One 146 2.6 in Huron, Ohio - Photo 11

Promotions

We are in the process of adding model data for 2025 Arctic Cat models. We do everything we can to ensure that all of our information is correct; however, during the initial entry process, we reserve the right to make additions, deletions, or modifications to model specifications, features, images and prices displayed on this and any associated webpage at any time without prior notice. Please contact your local dealer to confirm all information.

Due to continued challenges across supplier networks as well as increasing logistics costs, product pricing, freight charges, specifications, and features are subject to change at any time without prior notice. Please confirm all information with your local dealership.

Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact the dealer for more details.

  • Price, if shown and unless otherwise noted, represents the Manufacturer's Suggested Retail Price (MSRP) or dealer unit price and does not include government fees, taxes, dealer vehicle freight/preparation, dealer document preparation charges, labor, installation, or any finance charges (if applicable). MSRP and/or final sales price will vary depending on options or accessories selected; contact dealer for more details.

  • Images, where available, are presented as reasonable facsimiles of the offered unit and/or manufacturer stock images. Non-standard options or features may be represented. No guarantee of availability or inclusion of displayed options should be inferred; contact dealer for more details.