DRAG SPECIALTIES 139677 Piston Set Compression 3.498 .030 8/1

( Brand: Drag Specialties ), ( Manufacturer Part Number: 139677 ), ( Part Type: Piston Compression ), ( Warranty Details: See Manufacturer )

Review DRAG SPECIALTIES Piston Set 3.498 Inch .030 Bore 8/1 Compression Ratio Harley Davidson fits DS

Introducing the Specialties 139677 DS Piston Set, specifically designed for Harley-Davidson engines with a compression ratio of 3.498:1 and part number 030. This piston set is an essential upgrade for Harley-Davidson enthusiasts who are looking to improve the performance of their engine.

Crafted from high-quality forged aluminum, these pistons offer superior strength and durability compared to their cast counterparts. Each piston features a flat-top design, which allows for increased combustion efficiency and improved power output. The piston skirts are optimized for a snug fit in the cylinder bore, ensuring minimal piston-to-wall friction and reduced engine wear.

The piston rings included in this set are made from nitrided steel, which provides excellent ring sealing and reduces the amount of oil consumption. The rings are also designed to be self-aligning, ensuring proper installation and minimizing the risk of ring damage during installation.

The piston set also includes new piston pins, which are made from heat-treated steel for added strength and durability. The pins are also chrome-molybdenum coated, providing an extra layer of protection against wear and corrosion.

Each piston is precision-machined to ensure a perfect fit in the cylinder bore, and the piston-to-crankshaft clearance is carefully calculated to provide optimal engine performance. The piston set also includes new piston pin bushings, which are made from a high-performance material that provides excellent wear resistance and reduces friction.

Installing these pistons is a straightforward process, thanks to the detailed installation instructions that come with the set. The pistons are also compatible with OEM Harley-Davidson connecting rods and crankshafts, making this an ideal upgrade for Harley-Davidson owners who are looking to boost the power and performance of their engine without having to perform a complete engine rebuild.

In summary, the Specialties 139677 DS Piston Set is a high-quality upgrade for Harley-Davidson engines with a compression ratio of 3.498:1 and part number 030. With its forged aluminum pistons, nitrided steel piston rings, heat-treated steel piston pins, and high-performance piston pin bushings, this piston set is designed to provide superior strength, durability, and performance. Whether you're looking to increase horsepower, reduce engine wear, or improve combustion efficiency, this piston set is an excellent investment for any Harley-Davidson enthusiast.

Pros and Cons of Buying a 139677 DS Piston Set for Harley Davidson Motorcycles

The 139677 DS Piston Set is a popular aftermarket option for Harley Davidson motorcycles. This piston set is designed to provide better compression and improved performance. In this analysis, we will discuss the pros and cons of buying this piston set for your Harley Davidson.

1. Increased Compression: The primary benefit of the 139677 DS Piston Set is the increased compression. This can lead to better engine performance, increased horsepower, and improved fuel efficiency.

2. OEM Quality: The piston set is manufactured to OEM specifications, ensuring a perfect fit and reliable functionality.

3. Durability: The pistons are made from forged aluminum, which is stronger and more durable than cast pistons. This makes the pistons less prone to failure or damage.

4. Improved Engine Life: By upgrading to a high-performance piston set like the 139677 DS, you can extend the life of your engine by reducing wear and tear.

5. Better Power Delivery: The piston set can help improve power delivery throughout the RPM range, providing a smoother and more responsive riding experience.

1. Cost: The 139677 DS Piston Set is more expensive than stock pistons. This could be a deterrent for some riders who are on a tight budget.

2. Installation: Installing the piston set can be a complex and time-consuming process. It requires specialized tools and knowledge, so it may be necessary to hire a professional to do the installation.

3. Risk of Engine Damage: There is always a risk of engine damage when making significant modifications. Installing the piston set could potentially cause issues if not done correctly.

4. Potential Noise Increase: Upgrading to high-performance pistons can result in increased engine noise. This may not be a concern for some riders, but it could be a drawback for those who prefer a quieter ride.

The 139677 DS Piston Set offers several benefits for Harley Davidson motorcycle owners, including increased compression, OEM quality, durability, improved engine life, and better power delivery. However, it also comes with some drawbacks, such as a higher cost, complex installation process, potential engine damage, and increased noise.

If you are a Harley Davidson owner looking for improved performance and increased compression, the 139677 DS Piston Set is a solid option. However, it is essential to weigh the pros and cons carefully and consider your budget, installation capabilities, and preference for engine noise. If you decide to proceed with the purchase, make sure to have the piston set installed by a professional to minimize the risk of engine damage.

Details:

Harley Davidson FLH Electra Glide 1979-1984. Harley Davidson FLHS Electra Glide Sport 1980. Piston rings are not included. DS Piston Set 3.498 .030 Bore 8:1 Compression Ratio Harley Davidson: Pistons come complete with wrist pins and cir clips sold in pairs.

Harley Davidson FLH Electra Glide 1978-1984.

part #: 139677 prices

• $39.99-$64.99

specifications pistondon:

• for models: Ds
• for makes: Harley, Davidson
• brand: Drag Specialties
• mpn: 139677
• part type: Piston Compression
• warranty details: See Manufacturer

payments pistondon:

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

seller pistondon:

• rating: 99.2%
• city: Grand Rapids, Michigan
• # reviews: 610926

general pistondon:

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

offer pistondon:

• quantity: 5
• options: Ship-to-home
• availability: In Stock
• sold: 0
• started: April 22, 2025

returns pistondon:

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

shipping pistondon:

• class: Standard
• type: Fixed
• cost: $0.00
• carrier: UPS
• transit: 2-6 Days
• service: UPS Ground

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