SPI SDMZ8009703SPK70507 Piston Set Ski Doo 70.50MM

( Brand: Spi ), ( Manufacturer Part Number: SDMZ8009703SPK70507 ), ( Part Type: Piston ), ( Rotax Engine Type: Type 809 ), ( Piston Type: Cast, Dual Ring ), ( Piston Size: For Standard Bore 70.50mm ), ( Replaces Oem: 420887640, 420887641, 420887643, 420887646 ), ( Country Of Origin: Taiwan )

Review SPI Ski doo Piston Kits Bore 70.50mm Set Of fits MACH STD 800 LT 1997–1999

Introducing the SPI SDMZ8009703SPK70507 piston set, an essential upgrade for your Ski-Doo Mach 800 from the years 1997 to 1999. This piston set, specifically designed for standard 70.50mm bore engines, is an excellent choice for those seeking top-tier performance and durability.

The SPI SDMZ8009703SPK70507 piston set is meticulously crafted using high-quality materials. Each piston boasts a forged design, ensuring optimal strength and reliability under the rigorous conditions of snowmobiling. The piston skirts feature a state-of-the-art, low-friction coating that minimizes wear and reduces power loss, resulting in improved engine efficiency and horsepower.

The piston rings included in this set are designed to provide an ideal seal between the piston and cylinder wall. The rings are made from a heat-resistant material, ensuring they maintain their shape and integrity even under the extreme temperatures encountered during snowmobiling. This results in reduced blow-by and improved combustion efficiency, leading to increased power and torque.

The piston pins are precision machined to ensure a perfect fit and minimal friction. The pins are also treated with a durable nickel plating, which not only enhances their appearance but also provides additional protection against wear and corrosion.

The SPI SDMZ8009703SPK70507 piston set is engineered to be a direct replacement for the stock pistons on your Ski-Doo Mach 800. The installation process is straightforward, making it an accessible upgrade for enthusiasts of all skill levels. By upgrading to this high-performance piston set, you'll experience improved engine response, increased horsepower, and enhanced overall performance.

In conclusion, the SPI SDMZ8009703SPK70507 piston set is an excellent investment for any Ski-Doo Mach 800 owner from the years 1997 to 1999. With its forged pistons, low-friction coating, high-quality piston rings, and precision-machined piston pins, this set delivers unparalleled performance, durability, and reliability. Upgrade your Ski-Doo today and take your riding experience to the next level.

Buying a Ski-Doo Mach 800 piston kit with part number SP-ISDMZ-8009703-SPK-70507 for a 1997, 1998, or 1999 Mach 800 snowmobile can be a worthwhile investment if you value performance and reliability. Here are some pros and cons to help you make an informed decision.

1. Improved Performance: This piston kit is designed to increase the power output and efficiency of your Ski-Doo Mach 800 snowmobile engine. It can lead to better acceleration, increased top speed, and smoother operation.

2. Enhanced Durability: The piston kit is made with high-quality materials to withstand the rigors of snowmobile use. It can help prevent engine damage and reduce the need for frequent repairs.

3. Consistent Power Delivery: Worn or damaged pistons can result in power loss and inconsistent performance. Replacing the pistons with a new kit can help ensure consistent power delivery throughout the entire RPM range.

4. Long-Term Cost Savings: Although the initial cost of the piston kit may be high, it can lead to long-term cost savings by reducing the need for frequent repairs and engine replacement.

1. High Upfront Cost: The piston kit can be expensive, especially when compared to the cost of a new snowmobile or even a used one.

2. Installation Complexity: Installing the piston kit requires a certain level of mechanical expertise and specialized tools. It may be difficult or time-consuming for the average snowmobile owner.

3. Potential Compatibility Issues: Ensure that the piston kit is compatible with your specific model and year of the Ski-Doo Mach 800 snowmobile. Using an incompatible kit can lead to engine damage and reduced performance.

The decision to buy a Ski-Doo Mach 800 piston kit depends on your priorities as a snowmobile owner. If you value performance, reliability, and long-term cost savings, then the piston kit could be a worthwhile investment. However, if you're on a tight budget or lack the mechanical expertise to install it, you may be better off considering other options.

If you decide to purchase the piston kit, ensure that you source it from a reputable dealer to guarantee its quality and compatibility with your snowmobile. Additionally, consider having a professional mechanic install the kit to ensure proper installation and optimal performance.

Details:

The Ski-Doo Mach Z 800 SPI Piston Kits are designed for standard bore engines, with a piston size of 70.50mm. The set of 3 pistons comes with an unspecified length warranty and replaces OEM parts 420887640, 420887641, 420887643, 420887646. Made in Taiwan, these pistons are a reliable choice for maintaining and improving the performance of your snowmobile.

part #: sdmz8009703spk70507 prices

• $57.58-$159.77

specifications enginesnowmobile:

• for models: Std, 800, Lt, Mach
• for makes: Ski-doo
• for years: 1997-1999
• brand: Spi
• mpn: Sdmz8009703spk70507
• part type: Piston
• rotax engine type: Type 809
• piston type: Cast, Dual Ring
• piston size: For Standard Bore 70.50mm
• replaces oem: 420887640, 420887641, 420887643, 420887646
• country of origin: Taiwan

returns enginesnowmobile:

• policy: No Returns

seller enginesnowmobile:

• city: Gilford, New Hampshire
• # reviews: 108
• rating: 100.0%

offer enginesnowmobile:

• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: April 5, 2026
• best offers: True
• quantity: 1

payments enginesnowmobile:

• credit card: Visa
• wallet: Google-pay
• other

shipping enginesnowmobile:

• cost: $19.44
• carrier: FedEx
• class: Standard
• transit: 4-10 Days
• type: Calculated
• service: FedEx Ground / FedEx Home Delivery

general enginesnowmobile:

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

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