info
specifications
A New Breed of Power
858 Engine
The 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.
Purpose-Built
Based on decades of innovation, the 858 engine was built by Arctic Cat for Arctic Cat. Designed specifically for the CATALYST platform, the 858's proprietary design enhances power, agility and control. From working around the centerline steering to integrating components for weight reduction and increased performance, no compromises were made in pursuit of the ultimate ride.
Peak Performance
The 858cc engine provides all the horsepower and airflow you need for superior performance. A refined air intake system improves sealing at the lower airbox, reducing snow intrusion and maximizing consistency. Multiple under-hood inlets prevent snow ingestion, while our patented exhaust valve design stays tight to the piston as it moves. This delivers smoother exhaust flow through a wider RPM range on both primary and auxiliary ports — and cleaner emissions in all conditions.
Quicker Acceleration
Compared to Arctic Cat’s 794cc engine, the 858 delivers 11% more power and torque — and in a package that’s 4% lighter. This gives you an optimal power-to-weight ratio for quicker acceleration and a more responsive, pulse-pounding ride. Arctic Cat used an 85mm bore while increasing to a 75.6mm stroke to achieve more horsepower and deep, bottomless torque that pulls hard and smoothly through the entire RPM range. In MY26, recalibrated fueling and ignition enhance response across more of that range, making every squeeze of the throttle feel even more connected.
Greater Agility
The centralized mass and low center of gravity work with the CATALYST platform to provide precision and control unlike anything you’ve experienced. The innovative laydown engine design achieves the best mass centralization of any snowmobile on the market while staying lightweight and compact. And with updated engine mounting in MY26, vibration is further reduced — boosting rider confidence and comfort mile after mile.
Easy Maintenance
The CATALYST platform was designed to be durable and easy to service, and the 858 engine is no exception. With fewer parts, a revised crankcase mounting system, it’s stronger, sturdier and easier to maintain. With the easily removable, completely tool-less plastic panels on CATALYST snowmobiles, you can quickly access critical components to admire the beauty beneath the surface. There's even a robust snow flap reinforcement
Vehicle Data at A Glance
Instantly check your sled's speed, RPMs, coolant temperature, fuel level, odometer, reverse indicator and more.
The Info You Need
Within the main navigation, easily switch between map, vehicle, media and phone applications along with other features.
Pre-Loaded Trail Maps
Plan and track your route with US and Canadian maps that include gas stations, campgrounds, restaurants and more.
Change Map Views
Map views are layered so you can view topography, high-resolution BirdsEye Satellite Imagery, private/public lands and other valuable features.
Talk to The Group
Use Group Ride Radio to communicate with other users through 2-way voice or text, all without cellular coverage. You can even see and track up to 20 riders at once.
Connect Your Smartphone
Pair your mobile device to receive smart notifications, access the dial pad, view contacts, receive live weather forecasts, look at the radar and even play music.
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.
Ultimate Adjustability
AC5S Shocks
Designed by Arctic Cat, for Arctic Cat, the all new AC5S shocks offer 5 different positions and adjustable spring preload. They are uniquely calibrated for backcountry riding and showcase both Arctic Cat's legacy of durability and its signature style.
Optimized for Deep Snow
Aws 36 Front Suspension
The AWS 36 Front Suspension was designed specifically with the M 858 in mind. With lightweight spindles and precision engineered geometry, this suspension system optimizes your performance in deep snow.
Aws 36 Front Suspension
AWS 36 is the culmination of over 40 years of experience with the Arctic Wishbone Suspension, optimized for deep snow. By centralizing the weight distribution, the suspension now sits more directly under the rider, offering more flexibility and sled control.
The vertical steering has been designed with smoother, easier steering requiring less rider input. With this level of responsiveness, the M 858 will feel like a natural extension of your body, reacting to the slightest movement.
The spindles on the M 858 have also been redesigned- by shortening the top end but lengthening the spindle overall, the design is optimized to be more durable, while still remaining lightweight.
Increased Durability
Arctic Cat Mountain Belt Drive
The CATALYST platform utilizes Arctic Cat's belt drive system rather than a chain drive. This allows for enhanced durability and fewer parts in the system. The adjustable center distance allows for multiple ratio options and makes servicing simple.
Additionally, the track included with the AC Mountain Belt Drive ensures that the sled gets up on the snow quicker, avoiding trenching issues.
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 unmatched maneuverability and flotation - allowing you effortlessly go where others are left stuck and tired.
Single-Beam Rear Rail
ALPHA ONE Single-Beam Rear Suspension is the first rear suspension of its kind. The shift from two rails to one creates a single pivot point down the middle of its Power Claw track, so you can carve up the mountain with ease. With an extruded aluminum construction and magnesium attachment points, this light, lean and mean design gives you enhanced control and agility.
Starts Light, Stays Light
ALPHA ONE snowmobiles make lightweight performance the standard. The single rail sheds snow, where dual-rail suspensions trap it in the skidframe. On top of this, the skid system equalizes floatation across the width of the track, so you'll sink less and keep moving throughout the day.
More Maneuverability
With a single pivot point, the snowmobile leans and dips into every curve like it's second nature. Even with a longer track, your sled can handle tigher turns in technical situations compared to short-track, dual-rail snowmobiles. Unmatched maneuverability will unlock limitless possibilities.
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.
Lock in With Ease
All CATALYST platform models come factory-equipped with at least two mounting points for ATACH accessories. Installation is quick and easy: simply slide your accessory into place with a click. You won't need any modification, fasteners or tools.
Durable Design
ATACH is built for the harshest conditions. This rugged system is built with high-strength composite and utilizes dust covers to keep the system clean when not in use.
Keep It Safe
Your accessories are safe when installed with the ATACH 4-Point Latching System. Using the provided key, you can lock your accessories onto your sled to prevent theft. Even if you choose not to use the theft-prevention lock, your accessories will remain securely attached to your sled.
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.
Narrow Design Like No Other
The ADAPT CVT system's narrow design reduces engine strain and improves under hood accessibility, providing a superior experience.
Lightweight and Efficient
With its lightweight design, the ADAPT CVT System decreases rotating mass while giving you improved throttle response and enhanced power delivery.
Consistent Performance
The ADAPT CVT System features an idler bearing that maintains constant belt tension and keeps temperatures down. This offers smoother takeoffs and rides throughout the life of the belt by automatically adjusting to wear.
Unprecedented Traction
Power Claw Track
Unlock the backcountry with Power Claw™, a lightweight track that delivers the ultimate deep snow traction and performance. The staggered, forward curving paddle tower design won't fold over, allowing you to float over the deepest snow. Available in 146-in, 154-in and 165-in with 2.6-in or 3.0-in lugs.
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.
Features
All New 858 C-TEC2™ Engine
AC5S Shocks
Power Claw™ Track
Sport Gauge
Arctic Cat M 858 Sno Pro - Built to Conquer the Deep.
Specifications
Engine
| Engine Type |
858,2-Stroke |
| Displacement |
858cc |
| Cooling |
Liquid |
| Cylinders |
2 |
| Bore x Stroke |
85 x 75.6 mm |
| Lubrication |
Electronic Injection |
| Ignition |
Digitally Controlled CDI |
| Engine Stator Output |
270W @ 3000 RPM |
| Fuel Delivery |
Next Gen. 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
| Drive Clutch |
ADAPT |
| Driven Clutch |
ADAPT |
| Drive System |
AC M Belt Drive |
| Brakes |
Stealth 88 Hydraulic Master Cylinder |
| Clutch Calibration |
6,000-8,000 ft |
| Gearing |
24/63 (2.6 in) 22/64 (3.0 in) |
| Chain Pitch |
Belt |
| Track Drive Sprocket |
9 Tooth, 2.86 Pitch, Exvolute or 7 Tooth, 3.50 Pitch, Exvolute |
| Reverse |
Push-Button Engine |
Suspension
| Front Suspension |
AWS 36 |
| Ski Shocks |
ACSS |
| Sway Bar |
N/A |
| Front Travel |
7.6 in |
| Rear Suspension |
ALPHA ONE Rear Suspension w/10 in Rear Wheels |
| Front Track Shock |
AC5S |
| Rear Track Shock |
AC5S |
| Rear Travel |
14.5 in or 15.5 in |
Dimensions
| Overall Chassis Length |
126.5 in or 131 in |
| Overall Chassis Width |
42-44 in |
| Overall Chassis Height |
50 in |
| Track Type |
PowerClaw |
| Track Width |
15in |
| Track Length |
154 in |
| Lug |
2.60 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
| Type of Gauge |
Sport |
| Speedometer |
Digital |
| Tachometer |
Digital |
| Odometer |
Digital |
| Fuel |
Digital |
| Oil |
LCD Icon (Digital GB) |
| Coolant |
Digital Bar Graph (LCD Icon GB) |
| Clock |
N/A (Digital GB) |
| Battery Voltage |
N/A (Digital GB) |
| Altimeter |
N/A (Digital GB) |
| Hours |
Digital |
Features
| Color |
Black/Dusk Purple |
| Heat Exchanger |
Front/Short Tunnel |
| Starter |
Manual or Push-Button Electric Start |
| Handlebars |
Hooked w/ Grab Handle |
| Lighting |
LED |
| Seating |
Mountain |
| Standard Accessories |
12V Outlet, Sport Front Bumper, Integrated Goggle Holder, ATACH Mounting, Hand & Thumb Warmers, Ice Scratchers, Lightweight Mountain Brake Disc, Vertical Steering, Tether Switch, Visor Plug-In |
| Windshield |
N/A |
Certain features may require an additional add-on package that may not be included in the retail or sale price. Please contact the dealership for full details.
