DRAG SPECIALTIES 139662 Piston Set Compression 3-7/16 .010 8.5

( Brand: Drag Specialties ), ( Manufacturer Part Number: 139662 ), ( Part Type: Piston Compression ), ( Warranty Details: See Manufacturer )

Review DRAG SPECIALTIES Piston Set 3-7/16 Inch .010 Bore 8.5 Compression Ratio Harley Davidson fits DS

Introducing the 139662 DS Piston Set from Harley-Davidson, specifically designed for engines with a piston bore size of 3-7/16 inches and a compression ratio of 8.5:1. This piston set is an essential upgrade for Harley-Davidson motorcycle enthusiasts seeking improved engine performance.

The DS Piston Set is meticulously engineered using high-quality forged aluminum alloy, ensuring durability and strength. Each piston features a unique dome shape that optimizes combustion and power output, delivering more horsepower and torque to your engine.

The piston tops are fitted with low-friction rings designed to minimize wear and provide a tighter seal between the piston and cylinder wall. This results in reduced engine blowby, improved efficiency, and enhanced overall performance.

The piston skirt design is optimized for a snug fit within the engine cylinder, minimizing piston to wall clearance. This reduces friction and ensures consistent power delivery across the RPM range.

The 139662 DS Piston Set is designed to be a direct replacement for OEM pistons, making installation simple and straightforward. Each piston comes complete with a matching connecting rod, ensuring a perfect fit and optimal engine balance.

The 8.5:1 compression ratio of this piston set is well-suited for stock Harley-Davidson engines or those with mild performance modifications, providing a balance between power and drivability. Upgrading to this piston set can help breathe new life into your engine, resulting in improved acceleration, increased top-end power, and enhanced overall riding experience.

In summary, the 139662 DS Piston Set from Harley-Davidson is a high-performance upgrade for your motorcycle engine. Its forged aluminum construction, optimized piston design, and low-friction rings work together to deliver increased power, improved efficiency, and enhanced overall performance. Upgrade your engine today with this top-of-the-line piston set from Harley-Davidson.

Pros and Cons of buying a 139662 DS Piston Set for Harley-Davidson 3-7/16 inch, 010, 8.5 Compression

The 139662 DS Piston Set is a popular aftermarket option for Harley-Davidson motorcycles. This piston set is known for its 3-7/16 inch bore size, 010 piston pin length, and 8.5:1 compression ratio. In this analysis, we will discuss the advantages and disadvantages of purchasing this piston set, followed by a concluding recommendation.

1. Enhanced Performance: The 8.5:1 compression ratio provides an increase in power and torque, resulting in better overall performance.

2. Improved Engine Durability: The piston set is made of high-quality materials, ensuring a longer lifespan and reduced wear and tear on the engine.

3. Customization: This piston set offers a way for riders to personalize their Harley-Davidson motorcycle by upgrading its performance.

4. Affordability: Compared to other aftermarket options, the 139662 DS Piston Set is relatively affordable, making it an accessible choice for many riders.

1. Installation Complexity: Installing the piston set requires considerable mechanical expertise and specialized tools, which may be a challenge for some riders.

2. Potential Power Increase: The increased power may not be desirable for all riders, particularly those who prioritize fuel efficiency or a more relaxed riding experience.

3. Engine Tuning: The piston set may require additional engine tuning to ensure optimal performance, which could add to the overall cost and complexity of the project.

The 139662 DS Piston Set is an excellent choice for Harley-Davidson riders looking to enhance their motorcycle's performance and engine durability. While the installation process can be complex, the potential benefits outweigh the challenges for many riders. Ultimately, the decision to purchase this piston set depends on individual preferences, mechanical expertise, and desired riding experience.

If you are a Harley-Davidson rider seeking improved performance and engine durability, the 139662 DS Piston Set is a worthwhile investment. However, ensure that you have the necessary mechanical skills and resources to install the piston set or consult a professional for assistance. Additionally, consider the potential impact on fuel efficiency and your desired riding experience before making the purchase.

Details:

DS Piston Set 3-7/16 .010 Bore 8.5:1 Compression Ratio Harley Davidson: Pistons come complete with wrist pins and cir clips sold in pairs. In.Engine Type Shovel head/ Aluminum Quantity Pair Size Over Standard .010 in. Harley Davidson FL 80 Electra Glide 1980. Harley Davidson FL 1948.

Piston rings are not included.

part #: 139662 price

• $56.28

specifications pistondon:

• for models: Ds
• for makes: Harley, Davidson
• brand: Drag Specialties
• mpn: 139662
• part type: Piston Compression
• warranty details: See Manufacturer

shipping pistondon:

• type: Fixed
• class: Standard
• service: UPS Ground
• transit: 6-9 Days
• cost: $0.00
• carrier: UPS

payments pistondon:

• other
• credit card: Diners-club
• wallet: Paypal

offer pistondon:

• started: January 1, 2026
• quantity: 13
• options: Ship-to-home
• availability: In Stock
• sold: 0

returns pistondon:

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

general pistondon:

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

seller pistondon:

• city: Grand Rapids, Michigan
• # reviews: 664327
• rating: 99.7%

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