WISECO PK1241 Top End Piston Kit Compression 193564153883 12.7 77.00MM

( Brand: Wiseco ), ( Manufacturer Part Number: PK1241 ), ( UPC: 193564153883 ), ( C.a.r.b. Notice: Not Legal For Sale Or Use In California ), ( Bore Actual: 77.00mm ), ( Compression Ratio Actual: 12.7 ), ( Displacement: 250cc ), ( Note: Nikasil Bore ), ( Stroke: 53.6mm ), ( Type: Piston Kit )

Review WISECO Top End Piston Kit 12.7 Compression 77.00mm Bore fits STD

The WiseCO 1241 Top End Piston Kit with a compression ratio of 12.7:1 and a piston diameter of 77.00mm is an excellent choice for those seeking high-performance upgrades for their engine. This piston kit, specifically the part number 193564153883, is designed to deliver improved power and efficiency while maintaining exceptional reliability.

Each piston in this kit is meticulously crafted using high-strength forged aluminum alloy. This material ensures durability and resistance to engine heat, making it an ideal choice for high-performance applications. The piston crowns are engineered with a dish design that optimizes combustion efficiency and enhances power output.

The piston skirts in the WiseCO Top End Piston Kit are designed with a full-floating wrist pin system. This design allows the piston to float within the cylinder bore, reducing friction and promoting smooth engine operation. The piston rings are precision machined to ensure a perfect seal, minimizing compressive losses and maximizing engine efficiency.

The piston kit also includes new piston pins, rings, and clips. These components are designed to work in harmony with the new pistons, ensuring a proper fit and function. The piston pins are made from high-strength steel, ensuring the necessary strength and durability to handle the increased power output.

The WiseCO 1241 Top End Piston Kit is an excellent upgrade for enthusiasts looking to enhance the performance of their engine. Its high-quality materials, precise engineering, and robust design make it a reliable and effective solution for those seeking improved power and efficiency. Whether you're building a high-performance engine or simply looking to upgrade your existing one, this piston kit is an excellent choice.

Wiseco 193564153883 Top End Piston Kit (12.7 compression, 77.00mm std pk1241): A Detailed Analysis

The Wiseco 193564153883 Top End Piston Kit, with 12.7 compression and a standard bore size of 77.00mm (pk1241), is a popular choice among engine builders and enthusiasts. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this piston kit.

1. Enhanced Performance: This piston kit is designed for high compression engines, offering increased power and torque compared to stock pistons. The 12.7:1 compression ratio is suitable for performance applications and turbocharged engines.

2. Durability: Wiseco pistons are manufactured using forged material, ensuring strength and longevity. The top ring groove design is also engineered to reduce ring wear, contributing to better engine life.

3. Precision Machining: Each piston is precisely machined to ensure accurate fitment and optimal engine performance. This attention to detail results in reduced friction, improved combustion efficiency, and smoother engine operation.

4. Compatibility: The Wiseco 193564153883 Top End Piston Kit is compatible with a wide range of engines, making it a versatile option for various applications.

1. Cost: The price of this piston kit is relatively higher than OEM alternatives. However, the enhanced performance and durability features justify the additional investment for those seeking high-performance engine upgrades.

2. Installation Complexity: Installing aftermarket pistons requires extensive engine disassembly and reassembly. This process can be time-consuming and labor-intensive, resulting in higher installation costs.

3. Clearance Concerns: Depending on the engine application, clearance issues with aftermarket pistons may arise. Proper clearance must be maintained between the piston, cylinder walls, and other engine components to ensure optimal performance and engine life.

The Wiseco 193564153883 Top End Piston Kit offers several advantages, including enhanced performance, durability, precision machining, and compatibility. However, it comes with a higher cost and the complexity of installation. If you are seeking a high-performance piston kit for your engine and are willing to invest time and resources in the installation process, this kit is an excellent choice. On the other hand, if you are looking for a more budget-friendly option or prefer a simpler engine upgrade, you may want to consider other alternatives. Ultimately, the decision to purchase this piston kit depends on your engine goals, available resources, and personal preferences.

Details:

Labeling a product as being for Racing Only or Closed Course Competition is not sufficient it to be included under this classification. Slip on mufflers in applications whereby the catalyst is not contained original muffler an example of a replacement part. If the vehicle has a catalyst and installation of part does not remove catalyst, all other emissions related controls are reconnected, then this is considered replacement. 7700XU - 77.00mm Ring Set .9 X .8 1.5mm.

Check the shipping calculator for estimated costs. Some items are made to order and can have longer lead times; check the shipping details for an estimate. S742 - Piston Pin 16 x 41.91mm Non Chromed PK1241: Includes The Following Components4872M07700 - Yamaha YZ250F '01-04 12.7:1 CR 7700XU.

CW16 - 16mm Round Wire Locks Set of Two. This means that if a vehicle was not originally equipped with catalyst and all other emissions related controls were connected such as oxygen sensors are reconnected, then the part is considered Replacement Part. Each piston is built from race proven designs that are chosen by the top teams in all forms of racing including Supergrass, Motocross, GNCC, Super bike, and more. Competition or Racing Vehicle Parts that are used exclusively in competition on race only vehicles.

High Performance ring kit and alloy pin included with each piston for extended life sustained power. EO number and will arrive with appropriate labels to indicate the approved status. It must be a competition vehicle and not used at any time on public highway. Ask a question at the bottom of .

Replacement Parts that have the same function and affect on emissions as they are replacing. Modified Parts that alter the emissions control related performance from original part they are replacing, These may have catalysts in them but perform differently equipment or require alteration elimination of other components such as oxygen sensors. These parts do not require approval as long they are used on public highways. Full exhaust systems installed on vehicles that did not originally contain a catalyst and whereby the design allows re installation original function of any other emissions control related components are also considered replacement parts.

Wiseco complete top end Piston Kits are offered for nearly every popular motorcycle application.

specifications pistondon:

• for models: Std
• brand: Wiseco
• mpn: Pk1241
• upc: 193564153883
• c.a.r.b. notice: Not Legal For Sale Or Use In California
• bore actual: 77.00mm
• compression ratio actual: 12.7
• displacement: 250cc
• note: Nikasil Bore
• stroke: 53.6mm
• type: Piston Kit

returns pistondon:

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

general pistondon:

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

seller pistondon:

• rating: 99.8%
• # reviews: 108834
• city: Lebec, California

payments pistondon:

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

offer pistondon:

• options: Ship-to-home
• started: January 28, 2026
• quantity: 1
• sold: 0
• availability: In Stock

shipping pistondon:

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

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