SPI 09-780-04 Piston Ski Doo 642141101057 L/c .040 70.5MM

( Brand: Spi ), ( Manufacturer Part Number: 09-780-04 ), ( Part Type: Piston ), ( Country Of Origin: Taiwan ), ( UPC: 642141101057 )

Review SPI Piston Kits Many Ski doo L/c .040 Over Bore 70.5mm fits 500 1996–2000

Introducing the SPI (Ski-Doo Performance Industries) 09-780-04 piston, specifically designed for Ski-Doo 500 L/C 040 engines manufactured between 1996 and 2000 with a 70.5mm bore size. This high-performance piston is engineered to deliver superior reliability, durability, and power to your Ski-Doo snowmobile.

The piston is crafted using advanced materials, including a forged aluminum alloy crown that ensures exceptional strength and heat resistance. The skirt is designed with a full-length, ribbed profile that enhances piston stability and reduces friction for smoother engine operation. The piston ring grooves are precisely machined to accommodate top-quality piston rings that ensure a tight seal in the cylinder bore, reducing blow-by and improving combustion efficiency.

The piston features a 19mm compression height, providing optimal compression for efficient power transfer from the engine to the track. The piston's design also incorporates a 70.5mm bore size, ensuring a perfect fit for your Ski-Doo 500 L/C 040 engine.

This piston is ideal for riders seeking enhanced performance from their snowmobile. It is also an excellent choice for those who frequently operate their snowmobile in extreme conditions, as it is engineered to withstand the demands of high-performance riding and cold weather operation.

In summary, the SPI 09-780-04 piston is a top-quality, high-performance component designed specifically for Ski-Doo 500 L/C 040 engines manufactured between 1996 and 2000 with a 70.5mm bore size. It is engineered to deliver superior reliability, durability, and power, making it an excellent choice for riders seeking enhanced performance and improved engine efficiency.

Buying the SPI 09-780-04 piston for a Ski-Doo 500 L/C 040 with a 70.5mm bore size can be a consideration for those in need of a piston replacement. Here are some potential pros and cons to help make an informed decision:

1. OEM Compatibility: This piston is an original equipment manufacturer (OEM) part, which means it is specifically designed for use in Ski-Doo 500 L/C 040 snowmobiles. This ensures proper fitment and compatibility with other components.

2. High-Quality Construction: Ski-Doo is known for producing durable and reliable parts. The SPI 09-780-04 piston is expected to meet or exceed the standards set by the manufacturer.

3. Comprehensive Warranty: OEM parts often come with comprehensive warranties, providing peace of mind and potentially saving money on future repairs.

1. Cost: OEM parts can be more expensive than aftermarket alternatives. This piston may be more expensive than third-party options.

2. Availability: Depending on the location and availability from dealers, this piston may take longer to obtain compared to aftermarket alternatives.

3. Limited Performance Upgrades: Since this is an OEM part, it may not offer any additional performance upgrades.

The SPI 09-780-04 piston is a reliable and OEM option for those in need of a replacement for their Ski-Doo 500 L/C 040 snowmobile. Its high-quality construction, compatibility, and comprehensive warranty make it an attractive choice for those who prioritize originality and peace of mind. However, its cost and potential availability may be a concern for some. Ultimately, the decision to purchase this piston depends on your budget, time constraints, and personal preference.

If budget is a concern, consider exploring aftermarket options for a piston replacement. However, if you prefer the peace of mind that comes with an OEM part and have the financial resources to accommodate its cost, the SPI 09-780-04 piston is a solid choice for your Ski-Doo 500 L/C 040 snowmobile.

Details:

Piston weight is compatible with original piston. Manufactured by SPI. All SPI pistons, rings, pins, cir clips are manufactured to OEM specifications. T-Molly series pistons reduce friction, resist seizure, improve durability.

T-Molly series with Teflon-Molybdenum coating. Pistons are for .040 over bore size 70.50mm. 1996 Grand Touring 500. Made in Taiwan.

Includes 2 pistons, ring sets, wrist pins, cir clips as pictured. 1996 Formula SLS 500.

part #: 0978004 prices

• $26.99-$70.51

specifications enginesnowmobile:

• for models: 500
• for makes: Ski-doo
• for years: 1996-2000
• brand: Spi
• mpn: 09-780-04
• part type: Piston
• country of origin: Taiwan
• upc: 642141101057

shipping enginesnowmobile:

• type: Fixed
• cost: $0.00
• service: Standard
• class: Standard
• transit: 5-9 Days

returns enginesnowmobile:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

general enginesnowmobile:

• condition: New
• Snowmobile Parts > Engines Components > Snowmobile Engine Components

seller enginesnowmobile:

• # reviews: 418132
• city: Suamico, Wisconsin
• rating: 99.9%

payments enginesnowmobile:

• wallet: Apple-pay
• other
• credit card: Diners-club

offer enginesnowmobile:

• sold: 0
• started: May 23, 2026
• options: Ship-to-home
• availability: In Stock
• quantity: 4

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