YAMAHA 248-11631-70-96 Nos Piston 248-11631-71-95 ATM1B

( Engine Type: 2-stroke ), ( Type: Piston ), ( Machine Type: Dual Sport Motorcycle ), ( Vintage Part: Yes ), ( Country Of Origin: Japan ), ( UPC: 248116317195 )

Review YAMAHA Nos Piston At1m fits AT1 AT1MX STD 1969–1971

Introducing the Yamaha 248-11631-71-95 standard piston, specifically designed for use in Yamaha AT1, AT1M, AT1MX, and ATM1B engines from the years 1969 to 1971. This piston, part number 248-11631-71-95, is a crucial component in maintaining the optimal performance and longevity of your classic Yamaha watercraft.

Manufactured to Yamaha's exacting specifications, this piston boasts a forged construction, ensuring superior strength and durability. Its design features a compression height of 24.5mm and a total piston length of 72.0mm, making it an ideal match for the engines mentioned.

The piston crown is finished with a dish shape, which helps create optimal combustion chamber pressure for efficient engine operation. The piston skirt is engineered to provide a snug fit within the engine cylinder, minimizing the possibility of blowby and ensuring minimal power loss.

The piston ring grooves are precision-machined to accept the appropriate piston rings, ensuring proper sealing and compression within the engine cylinder. The piston also comes with a piston pin and piston pin bushings, which are essential for the correct installation and function of the piston.

In summary, the Yamaha 248-11631-71-95 standard piston is an essential upgrade for any Yamaha AT1, AT1M, AT1MX, or ATM1B owner seeking to restore their classic watercraft to its original glory. By ensuring optimal engine performance and longevity, this piston is an investment in the continued enjoyment of your Yamaha watercraft.

The Yamaha 248-11631-71-95 and 248-11631-70-96 pistons are aftermarket replacements for Yamaha AT1, AT1M, AT1MX, and ATM1B engines produced between 1969 and 1971. Here are some pros and cons of buying these pistons to help you make an informed decision.

1. High-quality material: These pistons are made of forged aluminum alloy, ensuring greater strength and durability compared to cast pistons.

2. Precise fit: These pistons are designed specifically for Yamaha engines, ensuring a precise fit and minimizing the need for modifications.

3. Improved performance: Forged pistons can handle higher compression and heat than cast pistons, resulting in improved engine performance.

4. Better reliability: The forged pistons' increased strength reduces the likelihood of piston failure, improving engine reliability.

5. Easy installation: These pistons come with all necessary hardware, making the installation process easier.

1. Cost: Forged pistons are generally more expensive than cast pistons due to their manufacturing process and superior materials.

2. Requires a skilled mechanic: Installing aftermarket pistons requires a skilled mechanic to ensure proper installation and engine tuning.

3. Potential engine modifications: Depending on the engine's current condition, installing aftermarket pistons may necessitate additional modifications to optimize engine performance.

4. Limited availability: Aftermarket pistons, especially for specific engine models and years, may be harder to find and source compared to OEM parts.

The decision to buy the Yamaha 248-11631-71-95 or 248-11631-70-96 pistons depends on your budget, engine performance goals, and the availability of OEM alternatives. If you're looking for improved engine performance, reliability, and durability, investing in these aftermarket forged pistons could be a worthwhile investment. However, keep in mind the additional costs and potential engine modifications that may be required during the installation process.

If you're seeking improved engine performance and reliability and have the budget for it, the Yamaha 248-11631-71-95 or 248-11631-70-96 pistons could be a sound investment. However, if cost is a major concern, or if OEM alternatives are readily available, it may be worth considering other options before purchasing these aftermarket pistons. Always consult a qualified mechanic before making a decision to ensure the best outcome for your engine.

Details:

NOS 56mm Yamaha Piston STD,: STD.

part #: 248116317195 prices

• $17.74-$59.99

specifications pistondon:

• for models: At1, At1mx, Std
• for makes: Yamaha
• for years: 1969-1971
• engine type: 2-stroke
• type: Piston
• machine type: Dual Sport Motorcycle
• vintage part: Yes
• country of origin: Japan
• upc: 248116317195

seller pistondon:

• rating: 99.5%
• city: Quitman, Texas
• # reviews: 6871

shipping pistondon:

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

returns pistondon:

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

payments pistondon:

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

general pistondon:

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

offer pistondon:

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

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