WISECO 559MO5650 Piston .5MM 56.50MM

( Brand: Wiseco ), ( Manufacturer Part Number: 559MO5650 ), ( Machine Type: Off-road Motorcycle ), ( Items Included: Piston Rings, Wrist Pin, Forged Piston, Circlips, Wrist Pin Needle Bearing, Top End Gasket Set ), ( Piston Diameter: 56.50mm ), ( Material: Aluminum Alloy, Steel, Forged Aluminum ), ( Engine Type: 2-stroke ), ( Type: Piston Kit ), ( Manufacturer Warranty: Unspecified Length ), ( Pin Diameter: 16.00mm ), ( Unit Quantity: Kit ), ( Country Of Origin: United States ), ( Performance Part: Yes ), ( Location: Njpb Pistons )

Review WISECO Piston .5mm 56.50mm Bore Yamaha fits YZ125 1986–1988

Introducing the WiseCO 559MO5650 piston, a high-performance replacement option for Yamaha YZ125 motorcycles manufactured between 1986 and 1988. This piston, crafted from top-tier materials, is designed to deliver superior power and reliability for your vintage off-road machine.

The WiseCO 559MO5650 piston boasts an overboring size of 5mm, which is a perfect fit for the 1986-1988 Yamaha YZ125 engines with a bore size of 56.5mm. The piston's crown is CNC machined to ensure a precise and accurate shape, ensuring optimal combustion efficiency and power output.

The skirt of this piston is forged from a high-strength alloy material, ensuring robustness and durability even under the most demanding riding conditions. The piston pin bore is precision machined to ensure a perfect fit for the piston pin, ensuring reliable engine operation.

The WiseCO 559MO5650 piston also features a ribbed design on the skirt, which helps to dissipate heat generated during the combustion process more effectively. This not only helps to reduce the risk of piston failure but also contributes to improved engine performance by maintaining optimal piston temperature.

The piston rings included with this kit are made from high-quality, heat-resistant materials, ensuring a snug fit and excellent sealing performance. The piston rings are also designed with a compatible ring gap to ensure easy installation and optimal engine performance.

This piston kit also includes a piston pin, piston pin retainer, and wrist pin bushings, ensuring a complete and easy installation process. The WiseCO 559MO5650 piston is a direct replacement for the OEM piston and is compatible with the stock crankshaft and connecting rod.

In summary, the WiseCO 559MO5650 piston is an excellent upgrade option for your 1986-1988 Yamaha YZ125 motorcycle, delivering improved power, reliability, and durability. With its precision machining, high-quality materials, and complete installation kit, this piston is the ideal choice for riders looking to get the most out of their vintage off-road machine.

The Wiseco 559MO-5650 piston is a high-performance aftermarket piston designed specifically for the Yamaha YZ125 motorcycles manufactured between 1986 and 1988. This piston offers several benefits and drawbacks for the rider.

1. Enhanced Power: The Wiseco piston is designed to deliver increased power and torque compared to the stock piston. This results in improved acceleration and top-end performance.

2. Lightweight: The piston is lighter than the stock piston, which reduces rotating mass and helps the engine rev more quickly.

3. Durability: Wiseco pistons are made using advanced materials and manufacturing processes, ensuring longer piston life and improved engine reliability.

4. Customizable: The piston is available in various sizes and specifications, allowing riders to customize their engine to suit their specific riding style and conditions.

1. Cost: Aftermarket pistons like the Wiseco 559MO-5650 are more expensive than stock pistons. This additional cost may be a deterrent for some riders.

2. Installation: Installing an aftermarket piston requires specialized knowledge, tools, and time. It is recommended that the installation be performed by a professional mechanic.

3. Compatibility: It is essential to ensure that the aftermarket piston is compatible with the rider's specific engine model and year. Failure to do so could result in engine damage or poor performance.

The Wiseco 559MO-5650 piston offers several benefits for riders of the Yamaha YZ125 motorcycles manufactured between 1986 and 1988, including increased power, lightweight design, durability, and customizability. However, the higher cost, installation complexity, and compatibility requirements are significant drawbacks.

If you are a serious off-road rider or racer, the Wiseco 559MO-5650 piston may be an excellent investment to improve your engine's performance and reliability. However, if you are a casual rider, the additional cost and complexity of installing an aftermarket piston may not be worth the benefits. In that case, it may be best to stick with the stock piston. Always consult with a professional mechanic or engine builder to determine if an aftermarket piston is the right choice for your specific situation.

Details:

Condition: New old stock. For Sale is a Wiseco Piston Kit, model # 559P2, new part 559MO5650, Product Series 2 Stroke Pro-Lite Series, Included Components Ring Set #2224CS, Wrist Pin #S514, CirClip #CW16, Bore Diameter 56.50mm, 56.45 Material 4032, Skirt Coating No, Oversize 0.50 Fitment: Yamaha YZ125 1986 -1988, in sale: Please examine pictures carefully to determine what parts are included. See pictures for details.

part #: 559mo5650 prices

• $134.95-$182.97

specifications pistondon:

• for models: Yz125
• for makes: Yamaha
• for years: 1986-1988
• brand: Wiseco
• mpn: 559mo5650
• machine type: Off-road Motorcycle
• items included: Piston Rings, Wrist Pin, Forged Piston, Circlips, Wrist Pin Needle Bearing, Top End Gasket Set
• piston diameter: 56.50mm
• material: Aluminum Alloy, Steel, Forged Aluminum
• engine type: 2-stroke
• type: Piston Kit
• manufacturer warranty: Unspecified Length
• pin diameter: 16.00mm
• unit quantity: Kit
• country of origin: United States
• performance part: Yes
• location: Njpb Pistons

seller pistondon:

• city: Landenberg, Pennsylvania
• rating: 99.6%
• # reviews: 2223

general pistondon:

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

returns pistondon:

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

shipping pistondon:

• service: USPS Ground Advantage
• carrier: USPS
• cost: $0.00
• type: Fixed
• transit: 5-9 Days
• class: Standard

offer pistondon:

• options: Ship-to-home
• best offers: True
• quantity: 1
• availability: In Stock
• sold: 0
• started: December 31, 2025

payments pistondon:

• wallet: Google-pay
• credit card: Diners-club
• other

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