1. Pistons, Rings & Piston Kits Products
  2. sku: 12550923640943782
  3. KB PERFORMANCE 305.005

KB PERFORMANCE 305.005 Keith Pistons 9.6

fits model: Flt, Flh, Fxr, Fxd, 305, Evo. make: Harley, Davidson. year: 1980.

305.005 Kb Performance Harley-davidson Keith Black 9.6 1 Pistons .005 Evo 80 Inch Flt Flh Fxr Fxd

( Brand: Kb Performance ), ( Manufacturer Part Number: 305.005 ), ( Machine Type: Evo Big Twin ), ( Items Included: Piston Rings ), ( Piston Diameter: 3.5 In ), ( Material: Aluminum Alloy ), ( Type: Piston ), ( Manufacturer Warranty: 1 Month ), ( Unit Quantity: Pair ), ( Country Of Origin: United States ), ( Performance Part: Yes )

Review KB PERFORMANCE Harley davidson Keith Black 9.6 Pistons .005 Inch fits EVO FLT FLH FXR FXD 305 1980

Introducing the KB Performance 305.005 Harley-Davidson Keith 9.6 pistons, specifically designed for the Evolution 80 engines found in various Harley-Davidson models such as FLT, FLH, FXR, and FXD. These high-performance pistons are an excellent upgrade for riders who seek improved power, efficiency, and durability from their motorcycle engines.

Each KB Performance piston is meticulously crafted using the finest materials, ensuring superior quality and reliability. The piston crown is engineered with a unique dish design that provides optimal combustion efficiency, resulting in increased power output. The skirt of the piston is engineered to ensure a perfect fit within the cylinder bore, minimizing friction and reducing the risk of piston slap.

The piston rings are another critical component of these high-performance pistons. They are manufactured using advanced materials that ensure a tight seal within the cylinder bore, reducing the amount of compression loss and improving overall engine performance. The rings are also designed to minimize friction, resulting in reduced engine wear and longer engine life.

The KB Performance 305.005 Harley-Davidson Keith 9.6 pistons are also designed to work seamlessly with the OEM Harley-Davidson cylinder heads and intake manifolds. This ensures that the installation process is straightforward and that the performance gains are maximized.

The piston design also includes a lightweight, yet strong, forged material for the piston pin and wrist pin. This innovative design reduces the rotating mass of the piston, allowing for quicker acceleration and smoother engine response.

In summary, the KB Performance 305.005 Harley-Davidson Keith 9.6 pistons are an excellent investment for Harley-Davidson riders looking to improve the power, efficiency, and durability of their Evolution 80 engines. These high-performance pistons are meticulously crafted using advanced materials and innovative designs, ensuring superior quality, reliability, and performance gains.

The Harley-Davidson Keith 9.6 pistons, part number 005, are aftermarket performance pistons designed for Harley-Davidson Flathead engines, including those found in the FTL, FLH, FXR, and FXD models. These pistons offer several potential benefits, but it is essential to consider both the advantages and disadvantages before making a purchase.

Advantages:

1. Increased Power: The primary reason to invest in aftermarket pistons like these is to gain a power boost. The Keith 9.6 pistons are specifically engineered to provide improved combustion efficiency, leading to increased horsepower and torque.

2. Enhanced Durability: Aftermarket pistons, like those from Keith Black, are often made from higher-quality materials than OEM pistons. This can result in increased durability and longevity, allowing riders to enjoy their bikes for longer periods without worrying about engine failure.

3. Improved Engine Response: With better piston design and materials, these aftermarket pistons can offer improved engine response, making the bike more responsive and agile.

Disadvantages:

1. Cost: Aftermarket performance pistons can be quite expensive, especially compared to OEM parts. The cost of the Keith 9.6 pistons, at $305.005, is a significant investment for most riders.

2. Installation Complexity: Installing aftermarket pistons requires a high level of mechanical expertise and specialized tools. It is recommended that these parts are installed by a professional mechanic to ensure a proper fit and function.

3. Risk of Engine Damage: Installing aftermarket performance pistons carries some risk of engine damage, particularly if the installer lacks the necessary experience or if the parts are not of the highest quality.

Conclusion:

The Harley-Davidson Keith 9.6 pistons offer several advantages, including increased power, enhanced durability, and improved engine response. However, these benefits come with a significant cost, the complexity of installation, and the risk of engine damage. Ultimately, the decision to purchase these pistons depends on the rider's priorities, budget, and mechanical expertise. If you are an experienced rider with a well-maintained bike and the financial means to invest in aftermarket parts, these pistons could be an excellent choice for improving your bike's performance. However, for less experienced riders or those with more modest budgets, the risks and costs may outweigh the potential benefits.

Recommendation:

If you are considering purchasing the Harley-Davidson Keith 9.6 pistons, we recommend that you carefully weigh the advantages and disadvantages. Consider your mechanical expertise, budget, and riding priorities before making the investment. It is also essential to ensure that the installation is performed by a qualified professional to minimize the risks associated with these aftermarket parts. If you decide that the benefits outweigh the costs and risks, these pistons could be an excellent choice for enhancing your Harley-Davidson's performance.

Details:

Keith Black piston set is .005 oversize with a 9.6:1 compression ratio for 1984 up Big Twin Evolution model's. Then contact me and I will let you know how to print a return shipping label at my cost. FLT FLH 1984 -1998. The combination of a low heat transfer piston alloy and high compression ring placement increases power economy.

The low heat transfer of the alloy keeps skirts cool, so piston expansion is minimal. Pistons are .005 oversize, for a 3.498 bore and has 9.6:1 compression ratio. The Keith Black 390 hyper eutectic alloy is cast in a permanent steel mold which makes it possible to build lightweight piston that more power and uses less fuel lasts longer.

part #: 305005 prices

  • $99.99-$238.95

specifications pistondon:

  • for models: Flt, Flh, Fxr, Fxd, 305, Evo
  • for makes: Harley, Davidson
  • for years: 1980
  • brand: Kb Performance
  • mpn: 305.005
  • machine type: Evo Big Twin
  • items included: Piston Rings
  • piston diameter: 3.5 In
  • material: Aluminum Alloy
  • type: Piston
  • manufacturer warranty: 1 Month
  • unit quantity: Pair
  • country of origin: United States
  • performance part: Yes

payments pistondon:

  • other
  • credit card: Diners-club
  • wallet: Apple-pay
  • money order

offer pistondon:

  • availability: In Stock
  • started: May 23, 2026
  • quantity: 1
  • options: Ship-to-home
  • sold: 0
  • best offers: True

general pistondon:

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

seller pistondon:

  • rating: 100.0%
  • city: Alvin, Texas
  • # reviews: 6809

returns pistondon:

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

shipping pistondon:

  • carrier: FedEx, USPS
  • class: Economy, Standard
  • type: Calculated
  • transit: 5-9 Days
  • service: FedEx Ground Economy, USPS Ground Advantage
  • cost: $9.66
for models: flt, flh, fxr, fxd, 305, evo, for makes: harley, davidson, for years: 1980, machine type: evo big twin, items included: piston rings, piston diameter: 3.5 in, type: piston, manufacturer warranty: 1 month, unit quantity: pair, country of origin: united states, performance part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, material: aluminum alloy, sku: 12550923640943782,

Kb Performance 305.005 Is Similar To:

pistondon logo
2 offers $99.99–$238.95 USD
  • Offer #1: $99.99 price + $9.66 shipping estimate = $109.65* total. The Keith Black 390 hypereutectic alloy is cast in a permanent steel mold which makes it possible to build a lightweight piston that makes more power and uses less fuel and lasts longer. FLT FLH 1984-1998.+$9.66 shipping
  • Offer #2: $238.95 price + $11.99 shipping estimate = $250.94* total. Allow a tighter fit and longer piston and ring life. KB pistons can be installed tighter than other pistons.+$11.99 shipping

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