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  2. sku: 9398012136431722
  3. SKIDOO 420888390

SKIDOO 420888390 Rotax Cdi Ignition Oil Injected Crankshaft

fits model: Sl, Sle, Touring, 500, 503, Formula. make: Skidoo.

420888390 Skidoo 500 Formula Sl Sle Touring Rotax 503 Cdi Ignition Oil Injected Crankshaft

( Manufacturer Part Number: 420888390 ), ( Part Type: Ignition Oil Crankshaft )

Review SKIDOO Rotax Cdi Ignition Oil Injected Crankshaft fits FORMULA SL SLE TOURING 500 503

Skidoo 500 Formula SLE Touring Rotax 503 CDI Engine Oil Injected Crankshaft

The Skidoo 420888390 500 Formula SLE Touring Rotax 503 CDI engine is a powerful and advanced snowmobile powertrain designed for those seeking a smooth, efficient, and high-performance riding experience. This particular engine model is an ignition oil injected crankshaft system, which is a significant upgrade from traditional fuel-injected systems.

The Rotax 503 CDI engine is a two-stroke, liquid-cooled powerhouse that delivers impressive power and torque. It features a bore x stroke of 77.5 x 68.6mm and a displacement of 499.6cc. The engine utilizes a crankshaft-mounted oil injector system, which ensures precise delivery of oil directly to the engine's combustion chamber.

The ignition system on this engine is an electronic closed-loop CDI system, which provides reliable and consistent ignition timing. The engine also includes a high-performance airbox and intake system, which ensures an ample supply of clean, cold air for optimal combustion.

The Skidoo 500 Formula SLE Touring Rotax 503 CDI engine is known for its excellent fuel efficiency, producing an impressive power-to-weight ratio. It delivers a thrilling riding experience with quick acceleration and responsive handling. The engine's advanced design also ensures low emissions, making it an environmentally-friendly choice for snowmobilers.

The engine is designed to be maintenance-friendly, with easy access to essential components. The oil filter, spark plugs, and air filter are all easily accessible for routine maintenance. Additionally, the engine utilizes a high-quality synthetic oil for optimal performance and longevity.

Overall, the Skidoo 420888390 500 Formula SLE Touring Rotax 503 CDI engine is a top-of-the-line powertrain designed for those seeking a high-performance, efficient, and responsive snowmobile riding experience. Its advanced features, including the crankshaft-mounted oil injector system, electronic closed-loop CDI ignition system, and high-performance airbox and intake system, make it a standout choice for serious snowmobilers.

The Skidoo 420888390 500 Formula SLE Touring with a Rotax 503 CDI ignition oil injected crankshaft is a high-performance snowmobile engine. Here are some pros and cons that may help in your decision-making process.

Pros:

1. High Performance: This engine is known for its power and impressive acceleration, making it suitable for experienced riders and those who enjoy a thrilling ride.

2. Fuel Efficiency: The oil injected system ensures that the engine receives an optimal fuel-air mixture, resulting in better fuel economy than some other snowmobile engines.

3. Durability: The Rotax 503 CDI engine is well-known for its durability and reliability, making it a good investment for those who plan to use their snowmobile extensively.

4. Easy Starting: The electronic ignition system ensures easy starting in various weather conditions.

Cons:

1. Expensive: This engine is more expensive than some other options, which may be a deterrent for some buyers.

2. Not Suitable for Beginners: The high performance and power of this engine make it unsuitable for beginners or those who are not experienced snowmobile riders.

3. Limited Warranty: Skidoo offers a limited warranty on this engine, which may not provide the same level of coverage as some other manufacturers.

Conclusion:

The Skidoo 420888390 500 Formula SLE Touring with a Rotax 503 CDI ignition oil injected crankshaft is a high-performance engine suitable for experienced riders who value power, fuel efficiency, and durability. However, its high cost and limited warranty may be a deterrent for some buyers. Ultimately, the decision to purchase this engine depends on your personal preferences, riding experience, and budget.

Recommendation:

If you are an experienced snowmobile rider with a higher budget and a desire for high performance and durability, then the Skidoo 420888390 500 Formula SLE Touring with a Rotax 503 CDI ignition oil injected crankshaft is an excellent choice. However, if you are a beginner or have a lower budget, you may want to consider a less expensive or less powerful engine option.

Details:

Thanks, -Paul, It is from a 1997 Formula 5 and will fit all of the '90s 503s as well.

part #: 420888390 prices

  • $88.00-$295.00

specifications snowpar:

  • for models: Sl, Sle, Touring, 500, 503, Formula
  • for makes: Skidoo
  • mpn: 420888390
  • part type: Ignition Oil Crankshaft

general snowpar:

  • Parts Accessories > Snowmobile Parts > Other Parts
  • condition: Used

returns snowpar:

  • time: 14 Days
  • paid by: Buyer
  • policy: Returns Accepted

seller snowpar:

  • # reviews: 11757
  • city: Clarksville, Michigan
  • rating: 99.7%

offer snowpar:

  • availability: In Stock
  • started: December 16, 2025
  • options: Ship-to-home
  • quantity: 1
  • sold: 0

shipping snowpar:

  • transit: 3-7 Days
  • class: Standard
  • cost: $25.00
  • service: Standard
  • type: Fixed

payments snowpar:

  • credit card: Visa
  • wallet: Google-pay
  • other
for models: sl, sle, touring, 500, 503, formula, for makes: skidoo, part type: ignition oil crankshaft,
category: snowmobile parts > parts, sku: 9398012136431722,

Skidoo 420888390 Is Similar To:

snowpar logo
2 offers $88.00–$295.00 USD
  • Offer #1: $295.00 price + $25.00 shipping estimate = $320.00* total. It is from a 1997 Formula 500,, and will fit all of the '90's 503's as well.+$25.00 shipping
  • Offer #2: $88.00 price + $31.10 shipping estimate = $119.10* total. Vintage Skidoo olympic clutch 7/8 crank dai.+$31.10 shipping

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