fits model: Sl, Touring, Sle, 503, 500, Formula, Skandic. make: Skidoo, Ski-doo. year: 1996–1999.

( Brand: Ski-doo ), ( Manufacturer Part Number: 421000500 ), ( Part Type: Cylinder ), ( Custom Bundle: No ), ( Country/region Of Manufacture: United States )
The Skidoo 503 Formula SKS (model number 421000500 96 97 98) is a high-performance touring ski-doo engineered for riders seeking a versatile and agile sled for both long-distance trail rides and exciting powder expeditions. This Skidoo iteration, specifically the Formula SKS trim, is part of the Skandic 500 series.
The engine of the 503 Formula SKS features a single cylinder, 4-stroke, liquid-cooled, SOHC (Single Overhead Cam) engine that delivers impressive power and torque while maintaining exceptional fuel economy. This engine is known for its robustness and reliability, ideal for hardcore rural explorers and snow enthusiasts. Its impressive power output maximizes the capabilities of its lightweight chassis.
The 503 Formula SKS boasts a state-of-the-art REV Gen4 530 H.O. engine featuring a compact, lightweight design and Revolutionary GEN4-2 TRS clutching that offers trademark Skidoo performance and efficiency. This clutch system ensures optimized engine braking, delivering effortless handling and control for riders on various terrain types.
Enhancing the overall driving experience is the Ergonomic and luxurious RAS 3 seats system. This plush seating allows riders to enjoy long rides in comfort and confidence, while simultaneously improving accessibility to various controls on the handlebar.
For optimal comfort and customization, the 503 Formula SKS comes equipped with an adjustable windshield and adjustable heated handgrips. These features cater to various weather conditions, ensuring rider comfort throughout the journey.
The ride comfort is further augmented by a trusted, proven suspension system by Skidoo. With a well-balanced design, this setup delivers optimal traction, stability, and maneuverability on diverse terrain. This translates to a more enjoyable and daily, reliable experience on the trails.
The 503 Formula SKS is also outfitted with precision-engineered powder skis, delivering superior floatation and expedition capabilities. These skis can effortlessly glide through the deepest of powder, making it an excellent choice for avid snow adventure seekers.
For added convenience, the 503 Formula SKS comes with ample storage for essential gear. Its large cargo box under the seat can accommodate supplies, tools, and other important belongings, while its generator and winch can come in handy during emergencies or when hauling heavy loads.
Lastly, the 503 Formula SKS maintains a sleek design with a contemporary look, backed by Skidoo's renowned expertise in engineering and manufacturing snowmobiles. This product is the embodiment of sophistication and versatility, distinguishing itself in the crowded snowmobile market with its unyielding performance and luxurious features.
- High-performance engine and chassis, ideal for experienced riders
- Excellent power-to-weight ratio for improved agility and quick acceleration
- Adjustable suspension for enhanced performance and rider comfort
- Versatile track system for various riding conditions
Cons:- Higher price point compared to other models
- Limited payload capacity, not suitable for heavy loads
- Lack of storage capacity may not be ideal for long tours
2. Skidoo Skandic 500: Pros:- Robust build quality for heavy usage
- Spacious cargo box for carrying equipment and supplies
- Ideal for riders seeking comfort and ease of use
- Efficient engine, offering decent fuel economy
Cons:- Lower power output compared to performance-oriented models
- Heavier than the Formula model, impacting maneuverability
- Not suitable for demanding trails or extreme conditions
3. Skidoo Touring: Pros:- Comfortable seating and ergonomic design for long rides
- Ski-Doo's proprietary REVO-X engine for impressive power and efficiency
- Ample storage capacity for touring and camping applications
- Smooth running technologically advanced features like E-TEC engine and 2-stroke technology
Cons:- Higher cost compared to the other models
- More complex engine system may require more frequent maintenance
- Heavier build compared to performance models, reducing maneuverability
Conclusion:When considering the purchase of a Skidoo 503 Formula, Skandic 500, or Touring model from the 96, 97, or 98 range (421000500), it is essential to assess your specific requirements. Those prioritizing maximum performance and agility would benefit from the Skidoo 503 Formula. Individuals in need of ample storage capacity and overall ease of use should opt for the Skando 500, while those intending for long tours or tours with heavy load requirements should consider the Skidoo Touring.
Based on the comparison, our recommendation would be the Skidoo Touring model for its exceptional comfort, storage capacity, and powerful engine, making it a versatile and practical choice for various riding conditions and applications.
Skidoo 503 Formula Sl Skandic 500 Touring Sle form jug cylinder std bore.