Experience exceptional riding with Yamaha snowmobiles available at Desjardins Marine Sainte-Adèle. Their thoughtfully designed ergonomics provide unparalleled comfort, allowing you to fully enjoy your snowy adventures. With advanced suspension technology, you benefit from optimal stability and manoeuvrability, even on the most rugged terrains. Not to mention the renowned Japanese reliability that characterizes Yamaha snowmobiles, giving you peace of mind during your rides. 

Discover our range of snowmobiles, as well as Yamaha parts, accessories, and equipment, and get ready to create unforgettable moments.

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ID # 35118845

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

  • 2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE
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Overview

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE M 858 MOUNTAIN CAT ALPHA ONE

  • All New 858 C-TEC2™ Engine
  • FOX® FLOAT QS3 Shocks
  • Power Claw™ Track
  • Arctic Cat G8 Digital Display
Specifications
Model
M 858 MOUNTAIN CAT ALPHA ONE
Category Name
Snowmobiles
Year
2025
Sale Type
New
Manufacturer
Arctic Cat
engine
Cooling
Liquid
Exhaust
APV IV w/ Full Stainless Steel Exhaust & EGT Sensors
Ignition
Digitally Controlled CDI
Cylinders
2
Engine Type
858, 2-Stroke
Lubrication
Electronic Injection
Displacement
858cc
Bore X Stroke
85 x 75.6 mm
Fuel Capacity
10.4 gal
Fuel Delivery
Next Gen. C-TEC2
Minimum Octane
91
Oil System Capacity
3.0 qt
Engine Stator Output
270W @ 3000 RPM
Coolant System Capacity
4.2 qt
powertrain
Brakes
Stealth Hydraulic Master Cylinder
Gearing
24/63
Reverse
Push-Button Engine
Chain Pitch
Belt
Drive Clutch
ADAPT
Drive System
AC M Belt Drive
Driven Clutch
ADAPT
Clutch Calibration
6,000-8,000 ft
Track Drive Sprocket
9 Tooth, 2.86 Pitch, Exvolute or 7 Tooth, 3.50 Pitch, Exvolute
suspension
Ski Shocks
FOX FLOAT 3 QS3
Rear Travel
13.5 in, 14.5 in, or 15.5 in
Front Travel
7.6 in
Rear Suspension
ALPHA ONE Rear Suspension
Front Suspension
AWS 36
Rear Track Shock
FOX FLOAT 3 QSL
Front Track Shock
FOX FLOAT 3 QS3
dimension
Lug
2.60 in or 3.00 in
Pitch
2.86 in or 3.50 in
Ski Stance
35-37 in - Adjustable
Track Type
PowerClaw
Runner Type
Single Runner w/ Carbide
Track Width
15 in
Track Length
146 in, 154 in, or 165 in
Ski Type/Width
G2 ProClimb - 7 in
Overall Chassis Width
42-44 in
Overall Chassis Height
50 in
Overall Chassis Length
126.5 in or 131 in
instrumentation
Oil
Digital
Fuel
Digital
Clock
Digital
Hours
Digital
Coolant
LCD Icon
Odometer
Digital
Altimeter
Digital
Tachometer
Digital
Speedometer
Digital
Type Of Gauge
Arctic Cat G8 (CAN w/o GRR)
Battery Voltage
Digital
features
Color
Skye Blue/Galaxy Blue
Seating
Mountain
Starter
Manual or Push-Button Electric Start
Lighting
LED
Handlebars
Hooked w/ Grab Handle
Heat Exchanger
Front/Short Tunnel
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
main features

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE 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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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 it's unique asymmetrical design, everyone will know that you're on an Arctic Cat.

2025 Arctic Cat M 858 MOUNTAIN CAT ALPHA ONE

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.