WISECO 509MO5100 Forged Big Piston Atac 509M05100 85CC CR-80 509P6

( Brand: Wiseco ), ( Manufacturer Part Number: 509MO5100 ), ( Machine Type: Off-road Motorcycle ), ( Items Included: Piston Rings, Wrist Pin, Forged Piston, Circlips ), ( Piston Diameter: 51.00mm ), ( Material: Aluminum Alloy ), ( Vintage Part: Yes ), ( Engine Type: 2-stroke ), ( Type: Piston ), ( Pin Diameter: 12.00mm ), ( Cylinder Bore Diameter: 2.008 ), ( Surface Finish: Forged Aluminum ), ( Country Of Origin: United States )

Review WISECO Forged 85cc Big Bore Piston Honda Atac fits CR80R CR80

The WiseCO 509MO5100/509M05100 forged 85cc big piston kit is an excellent upgrade option for Honda CR80R, CR80, and CR-80 ATAC minibike riders seeking enhanced performance and durability. This kit includes a forged piston with a diameter of 85mm and a compression height of 51mm, which is a significant improvement over the stock piston.

This WiseCO piston is designed with precision and attention to detail, ensuring a perfect fit and seamless integration with your minibike engine. The forged construction ensures maximum strength and durability, allowing the piston to handle the increased power and stresses that come with larger displacement engines.

The piston's crown is designed with a high-performance, domed shape that increases compression and improves combustion efficiency. The skirt is designed with a full-length oil cooling ring that ensures the piston stays cool under heavy use, reducing the risk of engine damage and increasing the lifespan of the piston.

The piston also includes a new ring package, consisting of a compression ring, a oil control ring, and a top ring. These rings are designed to provide optimal sealing and performance, ensuring that the engine runs efficiently and effectively. The piston pin is also included in the kit, ensuring a complete and easy installation process.

In summary, the WiseCO 509MO5100/509M05100 forged 85cc big piston kit is an excellent upgrade option for Honda CR80R, CR80, and CR-80 ATAC minibike riders seeking enhanced performance and durability. The forged construction, high-performance piston crown, oil cooling ring, and complete ring package make this kit a top choice for serious minibike enthusiasts looking to get the most out of their engine.

The Wiseco 509MO5100/509M05100 forged 85cc big piston kit is a popular upgrade option for Honda CR80R, CR80, CR-80 ATAC, and other similar mini bikes. This kit offers increased power and performance. Below are some pros and cons that might help you make an informed decision.

1. Increased Power: The forged piston kit provides more power and torque compared to stock pistons, making the bike faster and more responsive.

2. Durability: Forged pistons are stronger and more durable than stock pistons. They can handle higher engine loads and temperatures, making them ideal for high-performance applications.

3. Better Throttle Response: The forged piston kit provides better throttle response, allowing the bike to accelerate faster and smoother.

4. Improved Engine Life: The forged piston kit can help improve the overall engine life by reducing engine stress and heat.

1. Expensive: The forged piston kit is a more expensive upgrade compared to stock pistons.

2. Installation Complexity: Installing the forged piston kit requires some mechanical knowledge and tools, making it a more complex upgrade compared to some other options.

3. Potential Tuning: Depending on the specific bike model and engine setup, the forged piston kit may require some additional tuning to optimize performance and prevent potential engine issues.

The Wiseco 509MO5100/509M05100 forged 85cc big piston kit is an excellent upgrade option for riders looking to increase the power and performance of their Honda CR80R, CR80, CR-80 ATAC, or similar mini bikes. While it comes with a higher price tag and installation complexity, the benefits, such as increased power, durability, improved throttle response, and extended engine life, make it a worthwhile investment for serious mini bike enthusiasts.

If you have the mechanical skills, the necessary tools, and are committed to optimizing the performance of your mini bike, the Wiseco 509MO5100/509M05100 forged 85cc big piston kit is an excellent choice. However, if you are unsure about the installation process or the potential tuning requirements, it might be a good idea to consult with a professional mechanic or trusted performance parts retailer to ensure a successful and safe upgrade.

Details:

Made of aluminum alloy and featuring a forged construction, this piston boasts diameter 51.00mm pin 12.00mm. The set includes a wrist pin, circlips, and piston rings, providing complete solution for upgrading the engine. Manufactured by Wiseco in the USA, this piston offers a vintage part with superseded number of 509P6, ensuring perfect fit and reliable performance for your motorcycle. The WISECO 509M05100 Forged 85cc Big Bore Piston is a high-quality performance part designed for off-road motorcycles, specifically Honda CR80R and ATAC model's.

part #: 509mo5100 prices

• $99.99-$159.99

specifications pistondon:

• for models: Cr80r, Cr80
• for makes: Honda
• brand: Wiseco
• mpn: 509mo5100
• machine type: Off-road Motorcycle
• items included: Piston Rings, Wrist Pin, Forged Piston, Circlips
• piston diameter: 51.00mm
• material: Aluminum Alloy
• vintage part: Yes
• engine type: 2-stroke
• type: Piston
• pin diameter: 12.00mm
• cylinder bore diameter: 2.008
• surface finish: Forged Aluminum
• country of origin: United States

returns pistondon:

• policy: No Returns

shipping pistondon:

• carrier: USPS
• type: Fixed
• service: USPS Ground Advantage
• transit: 4-11 Days
• class: Standard
• cost: $9.99

offer pistondon:

• quantity: 1
• options: Ship-to-home
• availability: In Stock
• started: February 2, 2026
• sold: 0

payments pistondon:

• other
• wallet: Paypal
• credit card: Diners-club

general pistondon:

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

seller pistondon:

• # reviews: 958
• city: Dalton, Georgia
• rating: 99.0%

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