Dayco XTX Extreme Torque Drive Belt
1004-9613 (MFG #: XTX5057)
$203.99
Sale price
$203.99
Regular price
$203.99
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Dayco XTX Extreme Torque Drive Belt for Polaris Pro RMK 850 Snowmobile
Dayco XTX Extreme Torque Drive Belt for Polaris Pro RMK 850 Snowmobile
$203.99
Sale price
$203.99
Regular price
$203.99
SKU:1004-9613
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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
Polaris Pro RMK 850 Snowmobile (2019-2026)
The Polaris Pro RMK 850, a leading mountain snowmobile from 2019 to 2026, is renowned for its powerful 850 Patriot engine. This liquid-cooled, 2-cylinder, 2-stroke engine, with 840 cc displacement and Cleanfire Injection, was introduced in 2019, establishing a benchmark for performance with its exceptional power-to-weight ratio. Throughout its production, the Pro RMK 850 has seen key evolutions. In 2022, Polaris introduced the Matryx platform on certain models, bringing chassis and ergonomic enhancements, including the lightweight "Slash" design. For 2025 and 2026, the lineup expanded significantly with the addition of the Patriot 9R and Patriot Boost engine options, offering diverse performance characteristics. These later models also feature a redesigned throttle, a lower seat, improved running boards, and a lightweight headlight, with the 2026 models adding a 7S Ride Command screen. Trims are primarily distinguished by track length, such as 155, 163, 165, and 174 inches. FAQ:
Q: How do I ensure this part fits my specific Polaris Pro RMK 850?
A: Please use our year and model selector at the top of the page to confirm compatibility for your exact snowmobile. Q: Are there differences between the Pro RMK 850 models from 2019 to 2026?
A: Yes, there have been platform updates and new engine options introduced. Use our selector to find parts specific to your model year.
Maintenance
| Component | Interval | Details |
| Engine Oil and Filter | 25 h or 800 km or 1 month (break-in); then 50 h or 1,600 km or annually | Change oil and filter during break-in. After break-in, change filter with every oil change. Some guidelines also mention 100 h or 1,600 km. |
| Drive Belt | Regularly (inspection); as needed (replacement) | Inspect for wear before season and periodically. Check and adjust deflection. Break-in period recommended. |
| Spark Plugs | As needed (inspection/replacement) | Inspect and replace as needed. Ensure they are in good condition and tight pre-season. |
| Air Filter | As needed (inspection/replacement) | Inspect and clean often, especially in dusty conditions. Ensure proper installation of filter and airbox cover. |
| Coolant | Daily (level); seasonally (strength); yearly (pressure test); every two years (change) | Check level daily and add if needed. Inspect for leaks. Pressure test cooling system yearly. |
Maintenance intervals are based on general Polaris recommendations and may vary. Consult your model's owner's manual for precise information.