WISECO 4881M07700 Nos Piston High Comp 77MM 13.5

( Brand: Wiseco ), ( Manufacturer Part Number: 4881M07700 ), ( Part Type: Piston )

Review WISECO Nos Piston Yamaha 77mm High Comp 13.5 fits YZ250F 2005–2007

The WISCO 4881M07700 NOS (New Old Stock) piston is a high-performance replacement option for the 2005-2007 Yamaha YZ250F motorcycles with a 77mm bore size and 13.5:1 compression ratio. This piston is manufactured by WISCO, a trusted name in the aftermarket automotive and motorcycle industries, ensuring quality and reliability.

This piston is designed to provide enhanced power and efficiency for your Yamaha YZ250F. Its 77mm bore size makes it a direct fit for the stock engine, but its high compression ratio of 13.5:1 sets it apart from the original equipment. This high compression ratio allows for increased combustion efficiency and improved power output.

The WISCO 4881M07700 piston is made from a forged aluminum alloy, which offers superior strength and durability compared to cast pistons. The piston's top ring groove is designed for use with a 1mm compression ring gap, and it comes with a piston pin and wrist pin bushings included.

This NOS piston is in new, unused condition and has been stored properly, ensuring it is free from wear, corrosion, or other signs of use. Installing this piston in your Yamaha YZ250F can help restore lost power and improve overall engine performance.

In summary, the WISCO 4881M07700 NOS piston is a high-performance replacement option for the 2005-2007 Yamaha YZ250F motorcycles. With its 77mm bore size, 13.5:1 compression ratio, and forged aluminum construction, this piston offers increased power and efficiency, strength, and durability. The fact that it is NOS (New Old Stock) ensures it is in new, unused condition, making it an excellent choice for riders seeking top-quality parts for their motorcycle.

Wiseco 4881M07700 NOS Piston for 2005-2007 Yamaha YZ250F: A Comprehensive Analysis

The Wiseco 4881M07700 NOS (New Old Stock) piston is a popular aftermarket performance upgrade for the 2005-2007 Yamaha YZ250F motorcycles. This piston is designed for high compression applications, specifically with a 77mm bore size and 13.5:1 compression ratio. In this analysis, we will discuss the potential pros and cons of investing in this piston upgrade.

1. Enhanced Power: The primary reason for using high-performance pistons like the Wiseco 4881M07700 is to increase power output. This piston's design allows for better combustion efficiency, which can lead to improved horsepower and torque.

2. Durability: Wiseco is a reputable brand known for manufacturing high-quality pistons. Their forged pistons are stronger and more durable than stock pistons, which can help extend the life of the engine and withstand the added stress of increased power.

3. Customization: Upgrading to a high-performance piston like the Wiseco 4881M07700 allows for greater customization of the motorcycle. Riders who want to extract the maximum performance from their YZ250F can benefit from this upgrade.

4. Improved Engine Response: The higher compression ratio of this piston can lead to increased engine response and improved throttle response, which can make the bike feel more lively and responsive.

1. Cost: The Wiseco 4881M07700 NOS piston is a premium upgrade, and the cost can be a significant factor for some riders. The price difference between the stock piston and the aftermarket high-performance piston can be substantial.

2. Installation Complexity: Installing a high-performance piston like the Wiseco 4881M07700 requires a certain level of mechanical expertise. It is not a simple bolt-on upgrade and may require professional installation or extensive DIY skills.

3. Risk of Engine Damage: Increasing the compression ratio can increase the risk of engine damage if not done correctly. If the engine is not properly prepared or the compression ratio is too high for the specific bike and riding conditions, it can lead to engine damage.

The Wiseco 4881M07700 NOS piston is an excellent choice for riders who want to increase the power output, durability, and customization of their 2005-2007 Yamaha YZ250F motorcycle. However, the cost, installation complexity, and potential risk of engine damage are factors that should be carefully considered before making the investment.

If you are confident in your mechanical abilities, have the necessary resources, and are willing to accept the potential risks, the Wiseco 4881M07700 NOS piston can be an excellent upgrade for your Yamaha YZ250F. However, if you are unsure about the installation process, or if you prefer a lower-risk, more cost-effective upgrade, consider consulting with a professional mechanic or exploring other performance upgrades that are more accessible to beginners.

Details:

Save$$$, Features: All Wiseco Pistons are forged from high silicon, low expansion aluminum which offers superior strength, reduced weight, improved heat transfer, and longer life. Yamaha 2013 - WR250F 2012 2011 2010 2009 2008 2007 YZ250F 2006 2005. Diamond turned finish from one of the many CNC computer controlled turning centers guarantees you a perfect with no size variation

New old Stock Wiseco Piston kit. Brand new, just has the old school box and packaging. Never used, MINT.

part #: 4881m07700 prices

• $74.95-$239.99

specifications pistondon:

• for models: Yz250f
• for makes: Yamaha
• for years: 2005-2007
• brand: Wiseco
• mpn: 4881m07700
• part type: Piston

general pistondon:

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

seller pistondon:

• rating: 99.5%
• # reviews: 7096
• city: Minford, Ohio

offer pistondon:

• sold: 0
• quantity: 1
• started: March 7, 2025
• options: Ship-to-home
• availability: In Stock

returns pistondon:

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

payments pistondon:

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

shipping pistondon:

• type: Fixed
• cost: $0.00
• class: Standard, Expedited
• transit: 5-12 Days
• service: USPS Ground Advantage, USPS Priority Mail, USPS Priority Mail Express
• carrier: USPS

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