HARLEY DAVIDSON 22139-71P Aermacchi Piston Kit 350CC 2ND 74.4MM

( Brand: Harley Davidson ), ( Manufacturer Part Number: 22139-71P ), ( Type: Piston Kit ), ( Vintage Part: Yes ), ( Country Of Origin: Italy )

Review HARLEY DAVIDSON Aermacchi 350cc Piston Kit 2nd Over 74.4mm fits SPRINT SX SS 1971-74

Harley-Davidson 22139-71P Aermacchi Sprint SX 350cc Piston Kit (1971-1974, 2nd Generation, 74.4mm)

This Harley-Davidson 22139-71P piston kit is specially designed for the Aermacchi Sprint SX 350cc motorcycle model produced between 1971 and 1974. The kit includes second-generation pistons with a bore size of 74.4mm. This is an essential upgrade for riders who seek improved engine performance and durability for their classic Aermacchi Sprint SX motorcycle.

The pistons are meticulously crafted using high-quality materials to ensure optimal strength and reliability. Each piston undergoes rigorous testing to maintain the highest standards of precision and accuracy. The pistons' design enhances the overall efficiency of the engine, enabling it to deliver more power and torque while ensuring smoother operation.

1. Designed for Aermacchi Sprint SX 350cc motorcycles (1971-1974).

2. Second-generation pistons with a 74.4mm bore size.

3. High-quality materials for enhanced strength and durability.

4. Precision-engineered for optimal efficiency and performance.

5. Smoother operation for improved riding experience.

By installing this Harley-Davidson 22139-71P piston kit on your Aermacchi Sprint SX 350cc motorcycle, you'll not only enhance its power output but also contribute to its longevity. This upgrade is perfect for riders who want to restore their classic motorcycle to its former glory or for those seeking a performance boost.

Please note that installation of this piston kit requires professional expertise to ensure proper fitting and adjustment. Always consult your local Harley-Davidson dealer or an experienced mechanic for assistance with the installation process.

Pros and Cons of Buying a Harley-Davidson Aermacchi SX 350cc 1971-74 Piston Kit (22139-71P)

a. Compatibility: This piston kit is specifically designed for Harley-Davidson Aermacchi SX 350cc motorcycles manufactured between 1971 and 1974. Installing it ensures a perfect fit, reducing the chances of compatibility issues.

b. Enhanced Performance: Upgrading the pistons can lead to increased power output, improved throttle response, and smoother engine operation.

c. Cost-Effective: In some cases, purchasing a piston kit may be more cost-effective than buying a new engine or even a rebuilt one.

d. OEM Quality: Harley-Davidson is a reputed brand known for its high-quality parts. This piston kit is no exception and is expected to deliver reliable performance.

a. Complex Installation: Installing a piston kit is a complex process that requires specialized tools and a good understanding of engine mechanics. It may be best to have a professional mechanic perform the installation.

b. Additional Costs: Along with the piston kit, there might be additional costs for gaskets, seals, and other associated components that need to be replaced during the installation process.

c. Rare Availability: Due to its age, this piston kit may be difficult to find in stock at local dealerships. Online retailers or specialized motorcycle parts suppliers may be the best options.

d. Requires Regular Maintenance: Just like the original pistons, the new ones will also require regular maintenance and inspection to ensure optimal performance and longevity.

The Harley-Davidson Aermacchi SX 350cc 1971-74 Piston Kit (22139-71P) offers several advantages, such as compatibility, enhanced performance, and OEM quality. However, it comes with complex installation, additional costs, and potential availability issues. Weighing these pros and cons, if you are a dedicated motorcycle enthusiast or a professional mechanic, this piston kit could be an excellent investment for your Harley-Davidson Aermacchi SX 350cc motorcycle. If you are not confident in your mechanical abilities or prefer a more convenient solution, you may want to consider alternative options, such as a rebuilt engine or even a new motorcycle.

Details:

Please feel free to get in touch with any questions. This item ships worldwide. This kit includes, piston, rings, pin and clips in original packaging as pictured. This is a 2nd oversize kit, measuring 74.4mm as stamped on the head of piston.

Excellent real deal HD parts ready to bolt and go. Up for sale is an original new old stock Harley Aermacchi piston kit correct Sprint SS and SX 350cc model's from 1971-1974.

part #: 2213971p prices

• $149.89-$300.00

specifications pistondon:

• for models: Sx, Ss, Sprint
• for makes: Harley
• for years: 1971-74
• brand: Harley Davidson
• mpn: 22139-71p
• type: Piston Kit
• vintage part: Yes
• country of origin: Italy

offer pistondon:

• started: April 6, 2026
• options: Ship-to-home
• sold: 0
• availability: In Stock
• quantity: 1

shipping pistondon:

• carrier: USPS
• transit: 3-8 Days
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• cost: $16.25

payments pistondon:

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

seller pistondon:

• # reviews: 12157
• city: Philadelphia, Pennsylvania
• rating: 99.9%

general pistondon:

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

returns pistondon:

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

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