WISECO MN-QS2A Piston Kit Big Engine MN/QS2A

( Brand: Wiseco ), ( Manufacturer Part Number: MN/QS2A ), ( Compatible Year: 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989 ), ( Compatible Model: Yfm350fw Big Bear 4x4 ), ( Bundle Description: 1 Pc Genuine Wiseco Piston Kits ), ( Type: Piston Kits ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review WISECO Mn/qs2a Piston Kit Yamaha Big Engine fits BEAR YFM350FW FJ 4X4 1989–1999

Introducing the WISCO MN/QS2A Piston Kit, specifically designed for the 1989-1999 Yamaha YFM350FW Big Bear 4x4 engine (FJ). This high-performance piston kit is engineered to deliver enhanced power, improved reliability, and increased durability for your ATV.

Each piston in this kit is meticulously crafted from forged aluminum alloy, ensuring superior strength and rigidity. The piston crowns feature a dish design optimized for your engine's combustion chamber, allowing for efficient combustion and optimal power output. The piston skirts have a unique, enhanced coating that reduces friction and wear, extending the life of the pistons and reducing the need for frequent rebuilds.

The piston pins are made from high-strength steel and are precision machined to ensure a perfect fit in the piston and connecting rod. The pins are also treated with a special coating for added durability and reduced friction. The piston kit also includes new rings, which are made from high-quality, heat-resistant materials that provide excellent sealing and help prevent oil leaks.

The piston kit comes with all necessary hardware for installation, including new gudges, piston pin clips, and piston pin retainers. The kit is also backward compatible with earlier model Yamaha YFM350 engines, making it a versatile and valuable addition to any Big Bear enthusiast's toolbox.

The WISCO MN/QS2A Piston Kit is an excellent choice for riders who demand the best performance and reliability from their ATV. With its superior materials, optimized design, and easy installation, this piston kit is sure to help you get the most out of your Yamaha YFM350FW Big Bear 4x4 engine.

The WISCO MN/QS2A piston kit is a popular aftermarket option for the 1989-1999 Yamaha YFM350FW Big Bear 4x4 engine FJ. Here are some pros and cons to help you make an informed decision about purchasing this kit:

1. Enhanced Performance: The pistons in this kit are designed to provide increased power and torque, making your Big Bear engine more responsive and faster.

2. High-Quality Materials: WISCO pistons are made from forged aluminum, which is stronger and more durable than the original cast pistons. This results in improved reliability and longevity.

3. Improved Compatibility: This piston kit includes matching rings, wrist pins, and other necessary hardware, ensuring a perfect fit and easy installation.

4. Cost-Effective: Replacing the pistons in your Big Bear engine with an aftermarket kit like WISCO's can be more cost-effective than purchasing OEM parts or having the engine rebuilt.

5. Enhanced Appearance: The polished finish of the pistons adds a nice touch to the engine, making it look more visually appealing.

1. Potential for Engine Modifications: Installing a high-performance piston kit like WISCO's may require additional engine modifications to ensure proper operation and prevent damage. This could include upgrading the carburetor, intake, or exhaust system.

2. Risk of Damage During Installation: Installing pistons and rings can be a delicate process, and there's always a risk of damaging the cylinder walls or other components during installation. It's recommended to follow the installation instructions carefully and seek the help of a professional if necessary.

3. Increased Noise: The increased performance of the piston kit may result in more noise coming from the engine. This is normal and should not be a cause for concern, but it's something to be aware of.

4. Potential for Vibration: The increased power and torque of the piston kit may result in more vibration coming from the engine. This is also normal, but if the vibration becomes excessive, it may be necessary to investigate the cause and make any necessary adjustments.

The WISCO MN/QS2A piston kit for the 1989-1999 Yamaha YFM350FW Big Bear 4x4 engine FJ offers several benefits, including enhanced performance, improved durability, and a cost-effective alternative to OEM parts or engine rebuilding. However, it also comes with some potential drawbacks, such as the need for engine modifications, the risk of damage during installation, increased noise, and potential vibration. Ultimately, the decision to purchase this piston kit depends on your personal preferences, budget, and riding style. If you're looking for increased power and durability, and you're willing to take on the potential challenges that come with installing aftermarket parts, then this piston kit may be a good choice for you. If you prefer a more straightforward and low-maintenance riding experience, then you may want to stick with the OEM parts.

part # mnqs2a prices

• $53.70-$194.95

specifications atvsienna:

• for models: Yfm350fw, Fj, 4x4, Bear
• for makes: Yamaha
• for years: 1989-1999
• brand: Wiseco
• manufacturer part number: MN/QS2A
• compatible year: 1999 1998 1997 1996 1995 1994 1993 1992 1991 1990 1989
• compatible model: Yfm350fw Big Bear 4x4
• bundle description: 1 Pc Genuine Wiseco Piston Kits
• type: Piston Kits
• core charge: Free No Core Charge
• fitment type: Direct Replacement

shipping atvsienna:

• class: Standard
• transit: 3-9 Days
• service: Standard
• type: Fixed
• cost: $0.00

seller atvsienna:

• rating: 96.4%
• # reviews: 9687

general atvsienna:

• ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts
• condition: New

payments atvsienna:

• other
• credit card: Visa
• wallet: Apple-pay

offer atvsienna:

• quantity: 1
• availability: In Stock
• sold: 0
• started: August 27, 2025
• options: Ship-to-home

returns atvsienna:

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

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