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ProStar S4

The ProStar S4 4-stroke engine delivers fun and spirited performance in the under 100 HP class with easy ownership and proven dependability whether you are an outdoor adventurer, new or casual trail rider, or a cabin owner.

ProStar S4

The ProStar S4 4-stroke engine delivers fun and spirited performance in the under 100 HP class with easy ownership and proven dependability whether you are an outdoor adventurer, new or casual trail rider, or a cabin owner.

4-Stroke Engine Benefits

With the ProStar S4, enjoy all of the benefits of a 4-stroke engine including ease of maintenance and extended range.

Proven Architecture

ProStar S4 is a snow-optimized version of our legendary ProStar platform that has been proven in millions of Polaris off-road vehicle engines.

Longer Service Intervals

The ProStar S4 has long service intervals with a recommended oil change after the first 500 miles, then every 4,000 miles after that so you can spend more time riding and less time with routine maintenance.

4-Stroke Efficiency

Enjoy fewer fuel stops and more time riding with the 4-stroke efficiency of ProStar S4.

Durable & Easy to Own

ProStar S4 was engineered to provide riders the easiest ownership experience with great fuel efficiency, long service intervals, and the rock-solid dependability all ProStar engines are known for.

Dry Sump Oil System

Maintains proper engine lubrication in extreme terrain and conditions

Electronic Throttle

Easy to control at all speeds

Proven ProStar Components

Shared components including pistons, connecting rods, cylinder head, and more build on years of ProStar engine development across Polaris off-road vehicles

Fun & Spirited Performance

The ProStar S4 is engineered in the under 100 horsepower class to deliver a fun and approachable riding experience for both new riders or experienced riders who prefer to cruise the trails at their own pace.

Easy Throttle Control

The electronic throttle is easy to use, even for smaller hands, and is comfortable to grip for even the longest rides.

Drive Modes for Every Riding Style

The ProStar S4 has three unique drive modes to tailor to varying riding styles. Enjoy ECO mode for new riders with easy operation and best fuel economy. Choose Normal for the standard driving mode or Sport for highest performance.

Iron Dog Tested & Trusted

ProStar S4 is proven at the Alaskan Iron Dog, the world's toughest and most grueling snowmobile event, so you can can take on frigid ice-fishing trips & rough forest trails with confidence.

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