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  3. YAMAHA 1M2-11636-01-00

YAMAHA 1M2-11636-01-00 Piston Overbore 2ND .50MM

fits model: Dt250, Dt400. make: Yamaha. year: 1977-78.

1m2-11636-01-00 Yamaha New Oem Piston 2nd Overbore .50mm 1977-78 Dt250 And Dt400

( Manufacturer Part Number: 1M2-11636-01-00 ), ( Part Type: Piston ), ( Cylinder Bore Diameter: 85.50 ), ( Material: Aluminum Alloy ), ( Vintage Part: Yes ), ( Country Of Origin: Japan )

Review YAMAHA New Oem Piston 2nd Overbore .50mm And fits DT250 DT400 1977-78

Introducing the Yamaha 1M2-11636-01-00 piston, a high-performance upgrade for the classic Yamaha DT250 and DT400 motorcycles produced between 1977 and 1978. This piston boasts a second overbore of 50mm in diameter, which not only increases the engine's displacement but also enhances its power output and torque.

The piston is meticulously crafted from forged aluminum alloy, ensuring superior strength, durability, and reliability. Its advanced design features a compressive rise profile that optimizes combustion efficiency, allowing the engine to run cooler and more efficiently.

This piston comes with a piston ring package that includes a compression ring, an oil control ring, and a skirt oil scraper ring. These rings are precision-engineered to minimize friction and maximize sealing, ensuring optimal engine performance and longevity.

The piston's crown is designed with a honed surface finish, which provides an excellent surface for the piston rings to seat against, ensuring a proper ring gap and even compression. This honing process also improves the piston's thermal conductivity, allowing it to dissipate heat more efficiently.

Additionally, this piston comes with a lightweight, high-strength piston pin made of chrome-molybdenum steel. The pin's precision machining ensures a perfect fit and minimizes the risk of wear and fatigue.

This Yamaha 1M2-11636-01-00 piston is an ideal upgrade for vintage motorcycle enthusiasts and racers who want to enhance the performance of their DT250 or DT400. Its advanced design and high-quality materials ensure reliable, efficient, and powerful engine operation, making it a worthwhile investment for any serious motorcycle enthusiast.

A Detailed Analysis of Buying a Yamaha 1M2-11636-01-00 Piston for a 1977-78 DT250 or DT400

Introduction:

The Yamaha DT250 and DT400 are iconic motorcycles from the 1970s and 1980s. These bikes are known for their durability and performance. One common upgrade for these motorcycles is the piston overbore. This article will discuss the pros and cons of buying a Yamaha 1M2-11636-01-00 piston, a 50mm second overbore for the DT250 and DT400.

Pros:

1. Increased Power: The larger piston diameter increases the engine's displacement, leading to more power. This can be beneficial for riders who enjoy high-performance riding or for those who need more power for heavy loads or steep hills.

2. Smoother Engine Operation: The larger piston diameter can help reduce engine pulsation, leading to smoother engine operation. This can result in a more enjoyable riding experience.

3. Improved Compatibility: The Yamaha 1M2-11636-01-00 piston is specifically designed for the DT250 and DT400 models, ensuring a good fit and proper function.

Cons:

1. Increased Cost: The Yamaha 1M2-11636-01-00 piston is a performance upgrade and can be more expensive than stock pistons. This may not be a worthwhile investment for riders who are not looking for increased power or improved engine operation.

2. Potential Compatibility Issues: While the Yamaha 1M2-11636-01-00 piston is designed for the DT250 and DT400, it may require additional modifications or components to ensure proper function. This can add to the cost and complexity of the upgrade.

3. Potential Performance Trade-offs: The larger piston diameter can lead to increased engine stress and potential performance trade-offs. For example, the engine may require more frequent maintenance or may not perform as well in low-RPM situations.

Conclusion:

The Yamaha 1M2-11636-01-00 piston is a performance upgrade that can provide increased power and improved engine operation for the DT250 and DT400 motorcycles. However, this upgrade comes with additional costs, potential compatibility issues, and potential performance trade-offs. Riders who are looking for high-performance riding or who need more power for heavy loads or steep hills may find this upgrade worthwhile. On the other hand, riders who are satisfied with the stock performance of their motorcycle may not find this upgrade necessary. Ultimately, the decision to purchase the Yamaha 1M2-11636-01-00 piston should be based on an individual's riding style, needs, and budget.

Recommendation:

For riders who are considering the Yamaha 1M2-11636-01-00 piston upgrade, it is recommended to thoroughly research the upgrade process, including potential compatibility issues and performance trade-offs. It is also recommended to consult with a knowledgeable mechanic or motorcycle specialist to ensure that the upgrade is performed correctly and safely. Finally, riders should carefully consider their riding style, needs, and budget before making the decision to purchase the upgrade.

Details:

New OEM Yamaha Piston 1M2-11636-01-00 2nd overbore .50mm 1977-78 DT250 DT400.

part #: 1m2116360100 prices

  • $75.00-$179.95

specifications pistondon:

  • for models: Dt250, Dt400
  • for makes: Yamaha
  • for years: 1977-78
  • mpn: 1m2-11636-01-00
  • part type: Piston
  • cylinder bore diameter: 85.50
  • material: Aluminum Alloy
  • vintage part: Yes
  • country of origin: Japan

shipping pistondon:

  • transit: 4-10 Days
  • class: Economy
  • service: FedEx Ground Economy
  • carrier: FedEx
  • type: Calculated
  • cost: $9.66

offer pistondon:

  • started: March 13, 2026
  • availability: In Stock
  • options: Ship-to-home
  • quantity: 1
  • sold: 0
  • best offers: True

payments pistondon:

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returns pistondon:

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

seller pistondon:

  • city: Troy, New York
  • rating: 100.0%
  • # reviews: 342

general pistondon:

  • condition: New
  • Motorcycle Scooter Parts Accessories > Engines Engine Parts > Pistons, Rings Piston Kits
for models: dt250, dt400, for makes: yamaha, for years: 1977-78, part type: piston, cylinder bore diameter: 85.50, vintage part: yes, country of origin: japan,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, material: aluminum alloy, sku: 11179042353047721,

Yamaha 1M2-11636-01-00 Is Similar To:

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2 offers $75.00–$179.95 USD
  • Offer #1: $75.00 price + $9.66 shipping estimate = $84.66* total.+$9.66 shipping
  • Offer #2: $179.95 price + $11.95 shipping estimate = $191.90* total. 1977 DT400D - Crank - Piston. THIS IS A NEW NOS YAMAHA PISTON.+$11.95 shipping

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