JE PISTONS 398754 Piston Kit 193564567499 3.937 4.375 12.0 114

( Brand: Je Pistons ), ( Manufacturer Part Number: 398754 ), ( Part Type: Piston ), ( Country Of Origin: United States ), ( UPC: 193564567499 )

Review JE PISTONS Piston Kit 3.937 Inch Bore 4.375 Stroke 12.0 114 fits M8 CR

The JE Pistons 398754 piston kit is a high-performance solution designed for engines with a stroke of 3.937 inches, a bore of 4.375 inches, a compression ratio of 12.0:1, and a connecting rod length of 114mm. This piston kit is ideal for applications where increased power and durability are essential.

Each piston in this kit is meticulously crafted using JE's proprietary forging process, ensuring superior strength and rigidity. The piston crown is engineered with a dish shape that optimizes combustion efficiency and promotes even heat distribution. The piston skirt features a full-length, split ring design that ensures a secure fit in the cylinder bore, even under extreme conditions.

The piston rings included in this kit are made from high-quality, low-friction materials. The compression rings are designed to seal the combustion chamber and promote efficient combustion, while the oil control rings help prevent oil consumption and maintain proper engine lubrication.

The piston pin is made from hardened steel and features a unique design that reduces friction and promotes smooth operation. The pin bore is precision machined to ensure a perfect fit with the piston and connecting rod.

The JE Pistons 398754 piston kit is also compatible with various connecting rods, allowing for customization to meet specific engine requirements. This kit is engineered to meet the demanding needs of high-performance applications and is backed by JE's industry-leading warranty.

In summary, the JE Pistons 398754 piston kit is a high-performance solution designed for engines with specific dimensions and requirements. Each component is meticulously engineered for strength, durability, and efficiency, ensuring optimal engine performance.

A Comprehensive Analysis of the Je pistons 398754 Piston Kit: Advantages and Disadvantages

The Je pistons 398754 piston kit is designed for engines with a displacement of 3.937 to 4.375 liters, and it is suitable for CR engines with a compression ratio of 114:1 and a stroke length of 120mm. In this analysis, we will explore the key advantages and disadvantages of investing in this particular piston kit for your vehicle.

1. Superior Quality: The Je pistons 398754 piston kit is manufactured using top-tier materials, ensuring optimal durability and performance.

2. Enhanced Power: These pistons are designed to provide improved power output, allowing your engine to perform better and more efficiently.

3. Precise Fitment: The pistons in this kit are engineered to fit perfectly in your engine, reducing the likelihood of engine damage or failure caused by misfit components.

4. Comprehensive Kit: The Je pistons 398754 piston kit includes all the necessary components, making it a convenient and cost-effective solution for a piston replacement.

1. Potential for Noise: Some customers have reported increased engine noise after installing these pistons. This may be due to the pistons' design or the break-in period.

2. Break-in Period: Like any new engine component, these pistons will require a break-in period to ensure optimal performance. This may involve careful driving habits and regular engine checks during the initial stages.

3. Cost: Compared to some aftermarket piston options, the Je pistons 398754 piston kit may be pricier. However, the superior quality and performance benefits may justify the investment for some customers.

The Je pistons 398754 piston kit offers several advantages, including superior quality, enhanced power, precise fitment, and a comprehensive kit. However, it also comes with potential disadvantages, such as increased noise during the break-in period and a higher cost compared to some alternative options. Ultimately, the decision to purchase this piston kit depends on your specific requirements, budget, and tolerance for noise during the initial stages of use. If you prioritize superior quality and performance, this piston kit may be an excellent investment for your vehicle. On the other hand, if you're looking for a more budget-friendly option or are particularly sensitive to engine noise, you might want to explore alternative piston kits.

Details:

Never ship an item back in the manufacturers packaging, always use over-box. Offset pins reduce piston rock and minimize operating noise. Skirt notches for optimal clearance at bottom dead center. Chad?love for motorcycles and technology sparked a passion project that soon became his life's work.

Until recently it was difficult to reach out our fellow riders, but now with Iva and a $25 loan you can easily help rider in need. Born From Racing. Je Pistons Piston Kit 3.937 Bore 4.375 Stroke 12.0:1 CR 114 M8 - 398754. Accumulator groove taps combustion gases below the top ring to promote more consistent, positive seal and performance.

Addicted Guarantee. Includes two Pistons, premium ring packs, wrist pins and wire locks. Skirt coating reduces operating friction and wear. His grandfather had been a national racing champion and resides in the AMA motorcycle hall of fame.

part #: 398754 prices

• $376.30-$474.99

specifications pistondon:

• for models: M8, Cr
• brand: Je Pistons
• mpn: 398754
• part type: Piston
• country of origin: United States
• upc: 193564567499

general pistondon:

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

offer pistondon:

• sold: 0
• quantity: 7
• options: Ship-to-home
• availability: In Stock
• started: April 20, 2026

seller pistondon:

• # reviews: 66148
• rating: 99.4%
• city: Mission Hills, California

shipping pistondon:

• transit: 4-9 Days
• class: Standard
• type: Fixed
• service: Standard
• cost: $0.00

returns pistondon:

• paid by: Seller
• policy: Returns Accepted
• time: 60 Days

payments pistondon:

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

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