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  3. YAMAHA 3JE-11637-00

YAMAHA 3JE-11637-00 Nos Piston .75 3JE-11637-01-00

fits model: Yz250. make: Yamaha. year: 1989-90.

3je-11637-01-00 Yamaha 3je-11637-00 Nos 1989-90 Yz250 .75 Oversize Piston

( Manufacturer Part Number: 3JE-11637-00 ), ( Part Type: Piston ), ( Vintage Part: Yes )

Review YAMAHA Nos 1989 90 .75 Oversize Piston fits YZ250 1989-90

The Yamaha YZ250 1989-90 3JE-11637-00 75cc Piston is a crucial component of the high-performance YZ250 two-stroke motorcycle engine. This piston, specifically numbered 3JE-11637-00-00, was designed to deliver optimal power and efficiency during the racing era of the late 1980s and early 1990s.

This piston boasts a forged construction made of high-strength aluminum alloy. Forged pistons offer superior strength and durability compared to cast pistons. They are able to withstand the extreme pressure and heat generated by the two-stroke engine, ensuring reliable and consistent performance.

The piston crown features a unique design with a compact combustion chamber. This design promotes efficient fuel consumption and faster ignition, leading to increased power output. The piston skirt is designed with a narrow profile to minimize frictional losses, resulting in improved engine efficiency.

The piston also includes a reinforced ring land area. This design provides added strength and support to the piston rings, ensuring proper sealing and reducing piston ring wear. Additionally, the piston rings themselves are made of high-quality materials to ensure a snug fit and efficient sealing.

The piston pin is made of chrome-molybdenum steel, providing excellent strength and durability. The pin is also nitrided for added wear resistance and improved surface finish. The piston pin retaining clips are made of high-strength steel, ensuring a secure fit and preventing the piston pin from coming loose during operation.

This piston is specifically designed for use in the Yamaha YZ250 motorcycles produced between 1989 and 1990. Installing this piston in a compatible engine will help restore the bike to its original performance level, making it an excellent choice for enthusiasts looking to restore or upgrade their classic two-stroke Yamaha motorcycle.

In summary, the Yamaha YZ250 1989-90 3JE-11637-00 75cc Piston is a forged aluminum piston with a compact combustion chamber, narrow piston skirt, reinforced ring land area, and high-strength materials for the piston pin and clips. It is designed to provide optimal power, efficiency, and durability for the Yamaha YZ250 motorcycles produced during this time period.

The Yamaha YZ250 1989-90 model with a 75 piston, specifically the part number 3JE-11637-00 (for OEM piston) and 3JE-11637-01-00 (for aftermarket piston), is a popular choice among vintage motocross enthusiasts. Let's discuss the pros and cons of buying this piston to help you make an informed decision.

Pros:

1. High-performance: The 75 piston is known for its high-performance capabilities. It offers increased compression ratio, leading to more power and torque.

2. Durability: Yamaha is a reputable brand known for manufacturing high-quality components. The OEM piston (3JE-11637-00) is designed specifically for the YZ250 and is expected to deliver reliable performance.

3. Availability: Both OEM and aftermarket options are readily available, ensuring that you can easily find a replacement if needed.

4. Cost-effective: Aftermarket pistons can be a more cost-effective option for those who want to save money without compromising too much on performance.

Cons:

1. Risk of damage: Installing a higher-performance piston like the 75 piston can increase the risk of engine damage if not installed correctly or if the engine is not in good condition.

2. Complexity: Installing the piston requires specialized knowledge and tools. It may be necessary to hire a professional or invest in the necessary tools to do it yourself.

3. Potential compatibility issues: Although the 3JE-11637-01-00 aftermarket piston is designed to fit the YZ250, there is a risk of compatibility issues. Be sure to verify the piston's specifications and ensure it is the correct fit before purchasing.

Ending Conclusion:

The Yamaha YZ250 1989-90 model with a 75 piston (3JE-11637-00 or 3JE-11637-01-00) can be a great investment for those seeking high-performance and durability. However, it is essential to consider the potential risks, complexity of installation, and compatibility issues before making a purchase. If you are confident in your mechanical abilities and want to maximize power, the 75 piston could be an excellent choice. Alternatively, if you prefer a more straightforward and cost-effective option, consider a standard piston. Ultimately, the decision depends on your specific requirements, budget, and experience level.

Details:

With the trusted Yamaha brand and specific fit for YZ250 model, this piston is sure to be a valuable addition any motorcycle collection or restoration project. The product is a Yamaha 1989 90 YZ250 .75 Oversize Piston with the manufacturer part number 3JE-11637-00.

part #: 3je1163700 prices

  • $49.99-$71.49

specifications pistondon:

  • for models: Yz250
  • for makes: Yamaha
  • for years: 1989-90
  • mpn: 3je-11637-00
  • part type: Piston
  • vintage part: Yes

offer pistondon:

  • sold: 0
  • availability: In Stock
  • quantity: 1
  • started: February 7, 2026
  • options: Ship-to-home

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general pistondon:

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

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  • type: Fixed
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  • carrier: FedEx
  • cost: $15.00
  • service: FedEx Ground Economy
  • transit: 4-10 Days

seller pistondon:

  • # reviews: 941
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  • city: Frederick, Maryland

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  • time: 30 Days
for models: yz250, for makes: yamaha, for years: 1989-90, part type: piston, vintage part: yes,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 10472146091326632,

Yamaha 3JE-11637-00 Is Similar To:

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2 offers $49.99–$71.49 USD
  • Offer #1: $71.49 price + $6.00 shipping estimate = $77.49* total.+$6.00 shipping
  • Offer #2: $49.99 price + $15.00 shipping estimate = $64.99* total. 75 Oversize Piston with the manufacturer part number . The product is a Yamaha 1989-90 YZ250.+$15.00 shipping

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