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
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.
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 ADAPTT™ CVT system provides better throttle response, smoother power delivery and a ride like no other.
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
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
M 858 Sno Pro - Built to conquer the steep, the deep, and everything in between.
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 |
| Drive System |
AC M Belt Drive |
| Brakes |
Stealth 88 Hydraulic Master Cylinder |
| Clutch Calibration |
6,000-8,000 ft |
| Gearing |
24/63 * (2.6in) * 22 / 64 * (3in) |
| 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 3 |
| Ski Shocks |
AC59 |
| Sway Bar |
N/A |
| Front Travel |
7.6in |
| Rear Suspension |
ALPHA ONE Rear Suspension w/10 in Rear Wheel |
| 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 |
15 i |
| Track Length |
154 in |
| Lug |
3.0 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 or Arctic Cat G8 (CAN w/o GRR) |
| 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 |
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.
