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Description
Bred from a rich history of experienced belt builders, the Dayco XTX belt is specifically engineered to maximize the performance of the most extreme, high horsepower snowmobiles. Beating the competition on the race course is just one of many aspects that sets the XTX belt apart from its competition. Specially formulated high temperature Polymer along with the highest level of engineered reinforcement proves to perform better in belt operating temperature and efficiency than leading competitors. Its innovative break-through design of deeper cogs on top and rounded cogs on the bottom yield the advantages of ultimate flexibility and longer belt life while being a better alternative to the original equipment belt.
Key Features
- Faster and more consistent throttle response at high speeds
- Quicker throttle response at mid-speed acceleration
- Greater secondary acceleration at high RPMs
- Greater secondary acceleration as primary acceleration increases
- Reduction in slippage during the highest levels of torque
- Providing more power to track
- Better performance during deceleration (more responsive engine braking)
- Tested and proven reliability at well over 12,000 RPMs
- Cooler-running temperature than the leading competitors
Technical Specifications
- MFG. Part Number XTX5057
Vehicle Information
Ski-Doo Backcountry 850 Snowmobile (2019-2026)
The Ski-Doo Backcountry 850, produced from 2019 to 2026, is a crossover snowmobile designed for both trail and deep snow riding. It is powered by the potent 849 cc Rotax 850 E-TEC engine, delivering 165 horsepower. Over the years, the lineup has evolved with enhanced platforms and engine options. Initially built on the REV Gen4 platform (2019-2022/2023), the Backcountry gradually adopted the REV Gen5 platform starting in 2023, becoming widespread by 2025-2026. This transition brought a refined design, improved handling, and modern features such as LED headlights and 10.25-inch touchscreen displays on some models. A significant advancement is the introduction of the 180 hp Rotax 850 E-TEC Turbo R engine, available for the Backcountry X-RS from 2025. Suspension systems were also enhanced, with the arrival of RAS X and RAS RX front suspensions, and the cMotion X rear suspension, for increased performance across all terrains. Key trims include the base Backcountry, Adrenaline, X, and X-RS. FAQ:
Q: How can I ensure parts fit my specific model?
A: Use our year and trim selector at the top of the page to find compatible parts for your Ski-Doo Backcountry 850.
Maintenance
| Component | Interval | Details |
| Oil Filter (2-stroke E-TEC engine) | Not applicable | 2-stroke E-TEC engines do not use a traditional oil filter. Periodically inspect and clean the oil pump strainer. Check injection oil level before every ride. |
| Drive Belt | Check every 50 h | Inspect regularly for damage or excessive wear. Typical lifespan: 2 400 to 4 800 km, depending on riding style. |
| Spark Plugs | As per engine maintenance schedule | Inspect and replace if dirty or worn. Indexing may be required upon replacement; consult the manual. |
| Air Filter | Not applicable | Snowmobiles do not have a replaceable air filter element like cars. Check the air intake area and clear any snow or ice. |
| Coolant | Replace every 2 years | Check level regularly and inspect the system for leaks. |