YAMAHA 431-11631-00-96 Standard Piston Nos

( Machine Type: Off-road Motorcycle ), ( Items Included: Piston As Shown ), ( Piston Diameter: 69.95mm ), ( Material: Aluminum Alloy ), ( Vintage Part: Yes ), ( Engine Type: 2-stroke ), ( Type: Piston ), ( Unit Type: Unit ), ( Cylinder Bore Diameter: 70.00mm ), ( Country/region Of Manufacture: Japan ), ( Performance Part: No ), ( UPC: 431116310096 )

Review YAMAHA Genuine Oem Standard Bore Piston Nos fits YZ250 STD 1974-75

The Yamaha YZ250 Standard piston No. 431-11631-00-96 is a vital component for the maintenance and restoration of a classic 1974-75 Yamaha YZ250 STD motorcycle. This particular piston is specifically designed for the standard version of the YZ250 bicycle engine produced during these model years.

This piston is made of a high-quality forged aluminum material, ensuring both durability and optimal engine performance. Its piston crown is engineered to provide an ideal compression ratio and speed capability, making it suitable for standard use on a vintage motorcycle. Its design allows for efficient fuel combustion and improved power delivery.

This piston also includes a skirt to minimize friction against the engine's cylinder walls. It features a compression height of 29.3mm and a total piston height of 59.8mm, ensuring it fits perfectly within the engine's cylinder.

When it comes to installation, this piston kit includes all necessary components including the piston, piston rings, ring grooves, and other essential hardware. The piston rings, which are not mentioned in the part number, are typically also needed for proper installation and function and should be sourced separately if not included.

By installing this genuine Yamaha OEM piston, you'll be able to maintain or restore your YZ250 STD to its original specifications. Its high-quality construction guarantees longevity and reliable performance, meaning it's a worthy investment for any classic motorcycle enthusiast.

So, whether you're preparing for a vintage race, seeking to improve your YZ250's performance, or simply enjoying a quiet weekend ride on your cherished bike, the Yamaha YZ250 Standard piston No. 431-11631-00-96 is a must-have to help ensure your engine runs at its best.

The Yamaha YZ250 Standard (Model number: 431-11631-00-96) is a classic motocross motorcycle that was produced by Yamaha between 1974 and 1975. Here are some pros and cons of buying this old motorcycle for piston replacement or restoration:

1. Authenticity and Nostalgia value: The Yamaha YZ250 Standard is a classic motorcycle with a rich history in motocross racing. Buying these pistons for this bike will allow you to keep this cherished bike in running condition and retain its originality and appeal.

2. Performance and ride quality: The YZ250 Standard is known for its excellent handling, lightweight design, and powerful 2-stroke engine. Replacing the worn-out pistons will help restore the bike's performance and provide an enjoyable riding experience.

3. Availability of parts: Aftermarket parts for classic motorcycles such as the YZ250 Standard are readily available from various manufacturers and suppliers, ensuring that the parts you need are accessible and affordable.

1. Maintenance and Upkeep: Old motorcycles require more maintenance and upkeep than modern bikes. The YZ250 Standard, in particular, may require frequent tuning, cleaning, and replacement of worn-out parts to keep it in good running condition.

2. Safety Concerns: Older motorcycles like the YZ250 Standard may not meet modern safety standards. Lack of crucial safety features such as ABS, fuel injection, and modern brakes should be considered before purchasing and riding this bike.

3. Cost: The cost of buying, restoring, and maintaining a classic motorcycle like the YZ250 Standard can be significant. The cost of the pistons themselves may not be expensive, but the ongoing maintenance costs and the potential cost of accident repairs or replacements should be taken into account.

The Yamaha YZ250 Standard motorcycle, with its historic value, excellent ride quality, and widespread availability of parts, is a desirable classic motorcycle for collectors and enthusiasts. However, the upkeep costs, safety concerns, and potential cost of accidents should be carefully considered before deciding to buy and restore this bike. Ultimately, if you are willing to accept the challenges that come with owning an older motorcycle and are passionate about its history and riding experience, then the YZ250 Standard is a worthwhile investment.

If you are considering buying the Yamaha YZ250 Standard motorcycle for piston replacement, be sure to thoroughly research the availability, price, and compatibility of the aftermarket pistons before making a purchase. Additionally, consider discussing your plans with a knowledgeable mechanic or fellow motorcycle enthusiast to ensure that the restoration process is feasible for your skills and budget. Finally, never compromise on safety, always wear appropriate riding gear and consider investing in modern safety features for the bike.

Details:

The only exception to this would be defective items. The box is a bit tattered and missing the top flaps as shown, but piston has no damage or issues. Please look over all photos carefully and ask any questions before buying. This is a brand new piston from Yamaha.

Per Yamaha, this Piston STD will fit the following model's. 1974-75 Yamaha YZ250, OEM Part Number: 431-11631-00-96. These are not included in the item price or shipping cost. This is not normal,very rare, there are usually no problems, but it does happen.

Up for sale is a Genuine Yamaha OEM STD Bore Piston to fit the YZ250 model's listed. This is the piston only as shown, there are no other parts included. This is a STD Standard bore piston to fit cylinder size of 70.00mm. #0.9 YN3-14 2/25.

part #: 431116310096 prices

• $19.46-$84.99

specifications pistondon:

• for models: Yz250, Std
• for makes: Yamaha
• for years: 1974-75
• machine type: Off-road Motorcycle
• items included: Piston As Shown
• piston diameter: 69.95mm
• material: Aluminum Alloy
• vintage part: Yes
• engine type: 2-stroke
• type: Piston
• unit type: Unit
• cylinder bore diameter: 70.00mm
• country/region of manufacture: Japan
• performance part: No
• upc: 431116310096

offer pistondon:

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

seller pistondon:

• city: Midvale, Utah
• rating: 99.7%
• # reviews: 8342

general pistondon:

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

returns pistondon:

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

payments pistondon:

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

shipping pistondon:

• cost: $11.00
• service: USPS Priority Mail, USPS Ground Advantage, UPS Ground, UPS Next Day Air
• type: Calculated
• class: Expedited, Standard, One-day
• carrier: USPS, UPS
• transit: 4-8 Days

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