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These would quickly be replaced by lighter and more powerful two-stroke gasoline internal combustion engines and since the mid-2000s four-stroke engines have re-entered the market. The earliest snowmobiles were powered by readily available industrial four-stroke, air cooled engines. Skis at the front provide directional control.Įarly snowmobiles used simple rubber tracks, but modern snowmobiles' tracks are usually made of a Kevlar composite construction. Snowmobiles do not have any enclosures, except for a windshield, and their engines normally drive a continuous track at the rear. Snowmobiles built with the ability to accommodate two people are referred to as "2-up" snowmobiles or "touring" models and make up an extremely small share of the market.
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Older snowmobiles could generally accommodate two people however, most snowmobiles manufactured since the 1990s have been designed to only accommodate one person. Snowmobiling is a sport that many people have taken on as a serious hobby. It is designed to be operated on snow and ice and does not require a road or trail, but most are driven on open terrain or trails. A snowmobile tour at Yellowstone National Park.Ī snowmobile, also known as a Ski-Doo, snowmachine, sled, motor sled, motor sledge, skimobile, or snow scooter, is a motorized vehicle designed for winter travel and recreation on snow.