Sports Parts Inc. Snowmobile Slide
04-187-03XX (MFG #: 627-66-87)
$32.99
Sale price
$32.99
Regular price
$32.99
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Sports Parts Inc. Snowmobile Slide for Ski-Doo Formula Plus 521 Snowmobile
Sports Parts Inc. Snowmobile Slide for Ski-Doo Formula Plus 521 Snowmobile
$32.99
Sale price
$32.99
Regular price
$32.99
SKU:04-187-03XX
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Description
Keep your sled running smooth all season long with the Sports Parts Inc. (SPI) Snowmobile Slide. Built with precision and durability in mind, these high-quality replacement slides are engineered to reduce friction, extend track life, and provide consistent performance in all riding conditions.
Features:
- Durable Construction – Made from tough, wear-resistant material for long-lasting reliability.
- OEM Fit & Performance – Designed to meet or exceed original manufacturer standards for a seamless replacement.
- Smooth Track Operation – Reduces drag and heat buildup for better efficiency and longer track life.
- Easy Installation – Direct-fit design allows for quick replacement with minimal tools.
- Trusted Brand – Sports Parts Inc. is a leader in aftermarket snowmobile parts, ensuring quality you can count on.
Why You’ll Love It:
Whether you’re carving fresh trails, racing across lakes, or tackling tough backcountry terrain, the SPI Snowmobile Slide ensures your ride stays smooth and dependable. By minimizing wear and friction, it helps protect your sled’s suspension and track system—so you can spend more time riding and less time in the shop.
- Fits a variety of makes and models
- Perfect for seasonal maintenance or mid-season replacement
- Affordable performance upgrade from a trusted name in snowmobile parts
Technical Specifications
- MFG. Part Number 627-66-87
Vehicle Information
Ski-Doo Formula Plus 521 Snowmobile (1985-1991)
The Ski-Doo Formula Plus 521, produced from 1985 to 1991, established itself as a pioneering high-performance trail snowmobile. It debuted with an innovative Independent Front Suspension (IFS) and a robust 521cc liquid-cooled Rotax twin engine, consistently delivering powerful performance throughout its production run. This model featured an all-new chassis with an aluminum tunnel and a Progressive Reaction Suspension (PRS) in the rear, setting new standards for its era. While the core 521cc engine remained, the 1985 model year marked a significant platform introduction, featuring a new chassis and the Type 537 Rotax engine with oil injection. In 1991, a notable performance variant, the Formula Plus X, was introduced. This trim included specific engine enhancements like a different pipe, rotary valve, 38mm carburetors, and additional airbox intakes, alongside a chromoly front bulkhead, to further boost horsepower. Other trims like the LT (Long Track), E, XTC, and XTCE SS/SR were also offered in later years, providing options for different rider preferences. Q: How do I ensure this part fits my specific Ski-Doo Formula Plus 521?
A: To guarantee a perfect fit, please use the year and edition selector at the top of this page. This will filter parts specifically compatible with your snowmobile's exact configuration.
Maintenance
| Component | Interval | Details |
| Oil (Injection System) | Before every ride | Check reservoir level. Use only high-quality 2-stroke injection oil, TC-W3 rated or manufacturer-specific. Two-stroke engines with oil injection systems do not have a traditional engine oil filter. |
| Drive Belt | Inspect every 50 hours or if performance feels off. Replace every 2 400 to 4 800 km. | Inspect for signs of separation, edge cord coming out, glazing, or excessive narrowing. Maintain proper tension and height in the secondary clutch. |
| Spark Plugs | Inspect and replace as needed | As part of regular tune-ups or if performance issues arise. |
| Air Filter | Clean or replace as needed | Often seasonally or based on riding conditions, to ensure proper engine breathing. |
| Coolant | Check before every ride. Replace every 2 years. | Check level when the engine is cold. Use manufacturer-specified coolant or a 50/50 premix rated for powersports. |
The intervals provided are based on general practices for 2-stroke snowmobiles of this era. For the most accurate and detailed schedule, always consult the official Ski-Doo owner's manual specific to your model year.