1. Pistons, Rings & Piston Kits Products
  2. sku: 5160646421174563
  3. YAMAHA 438-11635-01-00

YAMAHA 438-11635-01-00 Nos Piston 74 74-77 .25 O/s

fits model: Dt250, Ty250, 250. make: Yamaha. year: 1974.

438-11635-01-00 Yamaha Nos 74 -74 Dt250 74-77 Ty250 250 Oem Piston .25 Mm O/s

( Type: Piston ), ( UPC: 438116350100 )

Review YAMAHA Nos Oem Piston .25mm O/s fits DT250 TY250 250 1974

The Yamaha DT250 1974-1977 250cc Overhead Valve (OHV) Piston (Yamaha part number 438-11635-01-00) is an essential component for the restoration or rebuilding of a classic Yamaha DT250 motorcycle. This piston, designed for use in the 74-77 models, is meticulously crafted to provide optimal engine performance and reliability.

The piston is made from high-quality materials, ensuring durability and resistance to wear and tear. Its precise dimensions and shape ensure a perfect fit in the cylinder bore, reducing the risk of engine damage from misfits or clearance issues. The piston's crown is designed with a compression height and shape that match the specifications of the original equipment, ensuring optimal compression ratio and efficient combustion.

The piston's skirt is designed with a narrow profile to minimize friction with the cylinder wall, reducing energy losses and improving engine efficiency. The piston rings, which come included with the piston kit, are designed to provide a tight seal against the cylinder wall, reducing blow-by and improving engine performance.

The piston's design also includes a cooling gallery, which improves the flow of coolant around the piston to help maintain optimal engine temperature and reduce the risk of thermal damage. The piston's pin boss is designed to accommodate a standard piston pin, ensuring a secure fit and reducing the risk of piston failure.

The piston is also designed with a lightweight, yet strong construction, which helps to reduce engine weight and improve overall performance. Its balance and reciprocating mass are optimized to reduce vibration and improve engine smoothness, making for a more enjoyable riding experience.

In summary, the Yamaha DT250 1974-1977 250cc Overhead Valve (OHV) Piston (Yamaha part number 438-11635-01-00) is a high-quality, precision-engineered component designed to provide optimal engine performance and reliability for classic Yamaha DT250 motorcycles. Its materials, dimensions, and design features are carefully crafted to match the original equipment specifications, ensuring a perfect fit and improved engine efficiency.

Pros and Cons of Buying Yamaha DT250 Piston Kit (438-11635-01-00) for 74-77 Models

The Yamaha DT250 piston kit (438-11635-01-00) is a popular choice among enthusiasts restoring or upgrading their vintage 74-77 DT250 and TY250 motorcycles. However, like any other aftermarket part, it comes with its advantages and disadvantages. In this analysis, we'll discuss both to help you make an informed decision.

Pros:

1. Authenticity: This piston kit is manufactured by Yamaha, ensuring a perfect fit and reliable performance.

2. Wear and Tear: Worn-out pistons are a common issue in vintage motorcycles, and replacing them with a new kit can improve engine efficiency and power.

3. Restoration: For those restoring their DT250 or TY250, this piston kit is an essential part of the process to ensure a fully functional engine.

4. Better Performance: A new piston kit can lead to better engine performance, improved combustion, and smoother running.

5. Longer Engine Life: By replacing worn-out pistons, you can extend the life of your engine and enjoy your motorcycle for a longer time.

Cons:

1. Cost: Original equipment manufacturer (OEM) parts, such as this piston kit, tend to be more expensive than aftermarket alternatives.

2. Limited Availability: Compared to aftermarket alternatives, OEM piston kits may have limited availability, making it harder to find and order.

3. No Performance Upgrades: While this piston kit ensures a perfect fit, it does not offer any performance upgrades, meaning you might need additional modifications for increased power.

4. Longer Delivery Time: As an OEM part, this piston kit might take longer to ship and arrive compared to aftermarket alternatives.

5. No Instant Gratification: Installing a new piston kit can be a time-consuming process, requiring engine disassembly and reassembly.

Conclusion:

The Yamaha 438-11635-01-00 piston kit for the DT250 and TY250 motorcycles offers several advantages, including authenticity, reliability, and improved performance. However, it also comes with some drawbacks, such as cost, limited availability, and the time-consuming installation process. Ultimately, the decision to purchase this piston kit depends on your priorities, budget, and the level of restoration or performance enhancement you're seeking for your vintage motorcycle. If you value originality and reliability, this piston kit is an excellent choice. However, if you're on a tight budget or looking for performance upgrades, aftermarket alternatives may be worth considering.

Details:

May fit other years/ model's. YAMAHA PART# 438-11635-01-00. 74-77 YAMAHA TY250. 74-76 YAMAHA DT250.

New in original package. 25mm OVERSIZE.

part #: 438116350100 price

  • $98.96

specifications pistondon:

  • for models: Dt250, Ty250, 250
  • for makes: Yamaha
  • for years: 1974
  • type: Piston
  • upc: 438116350100

seller pistondon:

  • rating: 100.0%
  • # reviews: 1988 2
  • city: Walkertown, North Carolina

offer pistondon:

  • quantity: 1
  • sold: 0
  • availability: In Stock
  • options: Ship-to-home
  • started: March 19, 2025

general pistondon:

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

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returns pistondon:

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

shipping pistondon:

  • transit: 3-8 Days
  • type: Calculated
  • carrier: USPS, UPS
  • service: USPS Ground Advantage, UPS Ground Saver
  • class: Standard, Economy
  • cost: $6.35
for models: dt250, ty250, 250, for makes: yamaha, for years: 1974, type: piston,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 5160646421174563,

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1 offer $98.96 USD
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