JE PISTONS 399164 Piston Kit 0910-7010 4.320 4.500 12.0

( Brand: Je Pistons ), ( Manufacturer Part Number: 399164 ), ( Part Type: Piston )

Review JE PISTONS Piston Kit 4.320 Inch Bore 4.500 Stroke 12.0 fits 500 CR

The Je pistons 399164 0910-7010 piston kit is an essential upgrade for any vehicle owner looking to enhance the performance and durability of their engine. This piston kit is specifically designed for engines with a stroke length between 4.320 inches and 4.500 inches, and a compression ratio of 12.0:1.

Each piston in this kit is meticulously engineered using high-quality forged aluminum alloy. This material offers superior strength and rigidity compared to cast pistons, ensuring that the pistons can withstand the extreme pressures generated during engine operation. The piston crowns are optimized for superior combustion efficiency, allowing for increased power output and improved fuel economy.

The piston skirts in this kit feature a state-of-the-art twin ring design. The first ring is a compression ring, which ensures a tight seal against the cylinder wall for optimal compression. The second ring is an oil control ring, which helps prevent oil from leaking past the piston and into the crankcase. This design not only improves engine performance but also helps reduce oil consumption.

The piston pins are made of high-strength steel, ensuring a secure fit within the piston and the connecting rod. The piston tops are finished with a durable, high-performance coating that provides excellent resistance to scuffing and wear.

This piston kit also includes new piston rings and ring end gaps. The piston rings are made of high-temperature, heat-resistant material to ensure a long service life. The ring end gaps are precision-engineered to ensure proper ring end clearance, which is essential for optimal piston ring performance and engine longevity.

Overall, the Je pistons 399164 0910-7010 piston kit is an excellent choice for anyone looking to upgrade their engine with high-performance pistons. Its advanced design features, including forged aluminum alloy construction, twin ring piston design, and high-strength steel piston pins, make it an ideal solution for increased power output, improved fuel economy, and extended engine life.

A Detailed Analysis of Je Pistons 399164 0910-7010 Piston Kit (4.320-4.500, 12.0 CR)

The Je Pistons 399164 0910-7010 piston kit is a popular aftermarket option for those seeking performance improvements in their engines. This piston kit is designed for engines with a stroke length between 4.320 inches and 4.500 inches and a compression ratio of 12.0:1. In this analysis, we will discuss the pros and cons of investing in this piston kit, and provide a concluding recommendation.

1. Enhanced Performance: The primary reason for purchasing this piston kit is to improve engine performance. With a higher compression ratio, the engine can burn fuel more efficiently, leading to increased horsepower and torque.

2. Durability: Je Pistons is known for its high-quality materials and manufacturing processes. This piston kit is expected to be robust and long-lasting, reducing the need for frequent replacements.

3. Customizable: The kit is available in various sizes, allowing users to choose the piston that best fits their engine specifications.

4. Improved Fuel Efficiency: By burning fuel more efficiently, these pistons can help improve fuel economy, resulting in cost savings over time.

1. Cost: The piston kit may be more expensive compared to OEM (original equipment manufacturer) options. However, the cost may be justified by the potential performance gains.

2. Installation Complexity: Installing the piston kit may require advanced technical skills and specialized tools, potentially adding to the overall cost and time investment.

3. Risk of Engine Damage: If not installed correctly, the higher compression ratio pistons could potentially cause engine damage.

4. Potential Power Increase: Depending on the engine and the vehicle's drivetrain, the increased power may not translate to noticeable performance gains or could even cause drivetrain damage.

The Je Pistons 399164 0910-7010 piston kit offers several advantages, including enhanced performance, durability, and improved fuel efficiency. However, it also comes with some disadvantages, such as cost, installation complexity, and the risk of engine damage.

If you're an experienced mechanic or enthusiast looking for significant performance improvements and are willing to invest time and resources into the installation process, this piston kit could be a worthwhile investment. However, for those with less experience or limited budgets, it may be wiser to consider other performance upgrades or OEM options. Always consult with a professional mechanic or engine builder before making a decision.

Details:

Specs: Compression Ratio 12.0:1, Piston Material Forged 2618 Aluminum, Product Name Kit, Displacement 108, Riding Street, Units Bore Size 4.320, Stroke length 4.500. Includes two Pistons, premium ring packs, wrist pins and wire locks. Skirt notches for optimal clearance at bottom dead center. Skirt coating reduces operating friction and wear.

This fitment information is based upon the stock version of motorcycle or unit referenced and any accessory added other modification could invalidate quick reference provided. Accumulator groove taps combustion gases below the top ring to promote more consistent, positive seal and performance. Offset pins reduce piston rock and minimize operating noise.

part #: 399164 price

• $474.99

specifications pistondon:

• for models: 500, Cr
• brand: Je Pistons
• mpn: 399164
• part type: Piston

offer pistondon:

• quantity: 9
• availability: In Stock
• sold: 0
• options: Ship-to-home
• started: January 21, 2026

seller pistondon:

• rating: 100.0%
• city: Omaha, NE
• # reviews: 3562

returns pistondon:

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

general pistondon:

• Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
• condition: New

payments pistondon:

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

shipping pistondon:

• transit: 2-5 Days
• carrier: FedEx, USPS, UPS
• type: Fixed
• class: Standard, Expedited
• cost: $0.00
• service: FedEx Ground / FedEx Home Delivery, USPS First Class, USPS Priority Mail, UPS Ground

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