1. Pistons, Rings & Piston Kits Products
  2. sku: 8848591497625713
  3. KB PERFORMANCE MN/7JM3

KB PERFORMANCE MN-7JM3 Forged Piston Kit Ys MN/7JM3 For

fits model: Flstsc, Softail. make: Harley, Davidson. year: 2007.

7jm3 Kb Performance Mn/7jm3 Super-duty Forged Piston Kit For 2007 Harley Davidson Flstsc Softail Ys

( Brand: Kb Performance ), ( Manufacturer Part Number: MN/7JM3 ), ( Type: Super-duty Forged Piston Kit ), ( Compatible Make: Harley Davidson ), ( Compatible Model: Flstsc Softail Springer Classic ), ( Bundle Description: 1 Pc Genuine Kb Super-duty Forged Piston Kit ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review KB PERFORMANCE Mn/7jm3 Super duty Forged Piston Kit For Harley Davidson Ys fits SOFTAIL FLSTSC 2007

Introducing the KB Performance MN/7JM3 Super-Duty Forged Piston Kit, specifically designed for the 2007 Harley-Davidson FLSTSC Softail YS model. This piston kit is a must-have upgrade for those seeking enhanced power, durability, and performance for their Harley-Davidson motorcycle.

The KB Performance MN/7JM3 pistons are meticulously crafted using forged 2618-T6 aluminum alloy. This process ensures a stronger and more consistent piston structure compared to the cast pistons that come stock. The forged pistons provide increased strength and durability, allowing for higher compression ratios and greater power output.

The piston kit includes four new pistons, ring sets, and wrist pins. The rings are made from high-quality, heat-resistant materials to ensure a proper seal and optimal engine performance. The wrist pins are made from chrome molybdenum steel, offering superior strength and durability.

One of the standout features of this KB Performance piston kit is its compatibility with various camshafts and intake systems. Whether you're running a performance cam or a stock cam, this piston kit will provide a noticeable improvement in power and torque.

Another advantage of the KB Performance MN/7JM3 Super-Duty Forged Piston Kit is its ability to accommodate up to a 12:1 compression ratio. This high compression ratio translates to more power and better fuel efficiency, making your Harley-Davidson Softail YS a true powerhouse on the road.

In summary, the KB Performance MN/7JM3 Super-Duty Forged Piston Kit for the 2007 Harley-Davidson FLSTSC Softail YS model is an excellent choice for riders looking to enhance their motorcycle's performance and durability. With its forged aluminum pistons, high-quality ring sets, and compatibility with various camshafts and intake systems, this piston kit is sure to deliver impressive results.

Buying a KB Performance MN/7JM3 super-duty forged piston kit for a 2007 Harley Davidson FLSTC Softail YS can be a significant investment for motorcycle enthusiasts looking to enhance the performance of their bike. Here are some pros and cons to consider before making a purchase:

Pros:

1. Increased Power: Forged pistons are stronger and more durable than stock pistons. They can handle higher compression ratios, leading to increased horsepower and torque.

2. Improved Engine Performance: The forged pistons are designed to provide better ring seal, reduce friction, and improve overall engine performance.

3. Enhanced Durability: Forged pistons are stronger and less prone to failure than stock pistons. They can withstand the rigors of high-performance riding, making them a good investment for riders who put a lot of miles on their bikes.

4. Customizable: Forged pistons can be customized to specific engine configurations, allowing riders to tailor the performance of their bike to their individual preferences.

Cons:

1. Cost: Forged piston kits can be expensive, with prices ranging from several hundred to several thousand dollars, depending on the brand and the specific engine application.

2. Installation: Installing a forged piston kit requires specialized knowledge and tools. It is recommended that the installation be performed by a professional mechanic to ensure proper fitment and function.

3. Potential Compatibility Issues: Forged piston kits may not be compatible with all engine configurations. It is important to verify that the kit is specifically designed for the 2007 Harley Davidson FLSTC Softail YS before making a purchase.

4. Potential Engine Damage: Installing forged pistons incorrectly or using the wrong piston-to-rod ratio can lead to engine damage, such as piston ring damage or even catastrophic engine failure.

Conclusion:

A KB Performance MN/7JM3 super-duty forged piston kit for a 2007 Harley Davidson FLSTC Softail YS can provide significant performance benefits, including increased power, improved engine performance, and enhanced durability. However, the high cost, potential compatibility issues, and the need for professional installation make it a significant investment. Riders should carefully weigh the pros and cons and consider their individual needs and preferences before making a purchase.

Recommendation:

If you are a serious Harley Davidson enthusiast looking to enhance the performance of your 2007 FLSTC Softail YS, a forged piston kit from a reputable manufacturer like KB Performance could be a worthwhile investment. However, it is important to ensure that the kit is specifically designed for your engine configuration and to have it installed by a professional mechanic to minimize the risk of engine damage. Additionally, be prepared for the high cost and potential compatibility issues that come with such a kit. Ultimately, the decision to purchase a forged piston kit should be based on your individual riding style, budget, and performance goals.

Details:

Super-Duty Forged Piston Kit 117ci. Standard Bore 4.125in. KB Super-Duty Forged Piston Kit for 2007 Harley Davidson FLSTSC Softail ys: Status: In Stock.

part #: mn7jm3 price

  • $396.69

specifications pistondon:

  • for models: Flstsc, Softail
  • for makes: Harley, Davidson
  • for years: 2007
  • brand: Kb Performance
  • mpn: Mn/7jm3
  • type: Super-duty Forged Piston Kit
  • compatible make: Harley Davidson
  • compatible model: Flstsc Softail Springer Classic
  • bundle description: 1 Pc Genuine Kb Super-duty Forged Piston Kit
  • core charge: Free No Core Charge
  • fitment type: Direct Replacement

shipping pistondon:

  • cost: $0.00
  • type: Fixed
  • transit: 4-7 Days
  • class: Standard
  • service: Standard

payments pistondon:

  • credit card: Discover
  • wallet: Paypal
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seller pistondon:

  • rating: 98.1%
  • # reviews: 13382
  • city: Multiple warehouses

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

offer pistondon:

  • started: November 11, 2025
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • quantity: 1
for models: flstsc, softail, for makes: harley, davidson, for years: 2007, type: super-duty forged piston kit, compatible make: harley davidson, compatible model: flstsc softail springer classic, bundle description: 1 pc genuine kb super-duty forged piston kit, core charge: free no core charge, fitment type: direct replacement,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 8848591497625713,

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