Stay away from engines in their first and probably second year after their launch. Nowadays, most engines are just as reliable, but 2-stroke engines are generally much less reliable compared to 4-stroke. A well-maintained 8,000-kilometer snowmobile can offer much more reliability than a poorly maintained 3,000-kilometer sled. BRP's snowmobile offerings belong to its Ski-Doo brand, which has become a patented eponym given its popularity and reputation for quality.
In fact, many modern snowmobiles come with two-stroke engines to account for changing environmental regulations. It is the modern version of the company founded by Joseph-Armand Bombardier, who is credited with inventing the first snowmobile. The Ski-Doo Expedition Xtreme 850 E-TEC represents the manufacturer's latest generation of REV Gen4 snowmobiles. Four-stroke snowmobile engines are considered to be more powerful, which is why enthusiasts love them.
The Yamaha Sidewinder X-TX SE 146 is an excellent choice if you're looking for the most reliable used snowmobile. Polaris has more than 60 years of experience manufacturing some of the most acclaimed snowmobiles on the market. The manufacturer introduced these models in 2002 and has since made constant revisions to improve the performance and weight of the four-stroke engine. In addition to being durable, a basic requirement for being among the most reliable snowmobiles, the Ski-Doo Expedition Xtreme 850 E-TEC has very solid functionality thanks to its Cobra WT track, which easily catches deep snow and keeps you on course.
Four-stroke snowmobiles tend to last much longer than two-stroke snowmobiles, ranging from 20,000 miles (32,000 kilometers) to 50,000 miles (80,000 kilometers). Yamaha snowmobiles with the manufacturer's venerable four-stroke engine are considered to be among the most reliable snowmobiles of all time.