1. Pistons, Rings & Piston Kits Products
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  3. YAMAHA 1LU-11637-00

YAMAHA 1LU-11637-00 Piston 3RD O/s 0.75

fits model: Yz250s, Yz250. make: Yamaha. year: 1986.

1lu-11637-00 Yamaha 1986 Yz250 S New Oem Piston 3rd O/s 0.75

( Manufacturer Part Number: 1LU-11637-00 ), ( Part Type: Piston ), ( Country Of Origin: United States ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: J8 Crp1-n Buk 55 )

Review YAMAHA New Oem Piston 3rd O/s 0.75 fits YZ250S YZ250 1986

The Yamaha YZ250 is a legendary motorcycle in the off-road racing community, known for its impressive performance and durability. One crucial component of this bike is its piston, specifically the third oversized piston with a displacement of 0.75 liters. This piston, part number 1lu-11637-00, is designed to deliver optimal power and efficiency for the YZ250's two-stroke engine.

This piston is meticulously engineered using high-quality materials to ensure superior performance and longevity. Its forged construction provides exceptional strength and durability, ensuring it can withstand the rigors of off-road racing. The piston's crown is designed to provide an excellent compression ratio, which in turn helps the engine deliver more power and torque.

The piston skirt is designed to minimize friction and maximize engine efficiency. This is achieved through the use of a low-friction coating on the piston skirt. Additionally, the piston's shape and design are optimized to ensure a snug fit within the engine's cylinder, which helps reduce engine blowby and improve overall engine performance.

The piston ring package included with this component is also designed to provide excellent sealing and durability. The piston rings are made from high-quality materials that ensure a tight seal between the piston and the cylinder wall. This helps prevent oil loss and ensures that the engine runs efficiently.

In conclusion, the Yamaha 1lu-11637-00 1986 YZ250S piston 3rd oversized 0.75 liters is a critical component for any YZ250 off-road racer. Its forged construction, optimized design, and high-quality materials ensure that it delivers exceptional performance and longevity. Whether you're racing in a local competition or tackling the most challenging off-road trails, this piston will help you get the most out of your YZ250.

Buying a Yamaha YZ250 piston, part number 1lu-11637-00, for a 1986 YZ250 motorcycle can be a worthwhile investment for several reasons. Here are some pros and cons to consider before making your purchase.

Pros:

1. Authentic Replacement: This piston is an original equipment manufacturer (OEM) part, ensuring a perfect fit and optimal engine performance for your 1986 YZ250.

2. Enhanced Durability: OEM pistons are engineered to be robust and long-lasting, reducing the likelihood of engine issues in the future.

3. Improved Engine Efficiency: A new piston can lead to better combustion and increased horsepower, enhancing the overall riding experience.

4. Peace of Mind: Having a genuine Yamaha part installed can provide peace of mind, knowing that your motorcycle is equipped with high-quality components.

Cons:

1. Cost: OEM parts, such as this piston, may be more expensive compared to aftermarket alternatives.

2. Availability: Depending on the supplier and location, it might take some time to obtain the part.

3. Installation: Installing the piston yourself requires specialized tools and knowledge, potentially leading to additional costs or the need for professional assistance.

In conclusion, purchasing the Yamaha 1lu-11637-00 piston for a 1986 YZ250 motorcycle offers several advantages, including enhanced durability, improved engine efficiency, and peace of mind. However, the cost and potential installation challenges should be considered before making the purchase.

If you value the reliability and performance of your motorcycle, investing in a genuine OEM piston may be the best choice for you. Consider weighing the pros and cons carefully and evaluating your budget and availability before making a decision.

Recommendation: If the piston is worn out or causing engine issues, it is highly recommended to replace it with a genuine Yamaha OEM piston, such as the 1lu-11637-00, to ensure optimal performance and peace of mind. If cost is a concern, researching aftermarket alternatives and comparing their specifications to the OEM part may help you find a cost-effective solution.

Details:

Ensures optimal performance and fit for engine rebuilds. Spotlight: A Day Inside .: Are these genuine OEM parts?, Yes. Residential delivery with lift gate is available.

To Watch. Do you accept offers?, Some listings offers. Look for the Make Offer button on listing page. Item must be in original, uninstalled condition with no modifications.

Every part is one-of-a-kind. We started with a single motorcycle dismantled in home garage. We review all reasonable offers promptly. Do you combine shipping?, Yes.

Larger items from $46.99. Please verify the part number and compatible model's before purchasing. 4.8 out of 5 stars across 322 reviews. FREE shipping on every order to the lower 48 states.

New genuine Yamaha OEM 0.75 3rd oversize piston, part number 1LU-11637- for the 1986 YZ250.

part #: 1lu1163700 prices

  • $145.99-$191.07

specifications pistondon:

  • for models: Yz250s, Yz250
  • for makes: Yamaha
  • for years: 1986
  • mpn: 1lu-11637-00
  • part type: Piston
  • country of origin: United States
  • manufacturer warranty: Unspecified Length
  • storage location: J8 Crp1-n Buk 55

returns pistondon:

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

payments pistondon:

  • other
  • wallet: Apple-pay
  • credit card: Mastercard

offer pistondon:

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

general pistondon:

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

shipping pistondon:

  • service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, FedEx 2Day, Overnight
  • carrier: FedEx, USPS
  • type: Fixed
  • cost: $0.00
  • transit: 4-8 Days
  • class: Standard, Expedited, One-day

seller pistondon:

  • # reviews: 221805
  • city: Odessa, Florida
  • rating: 99.4%
for models: yz250s, yz250, for makes: yamaha, for years: 1986, part type: piston, country of origin: united states, manufacturer warranty: unspecified length, storage location: j8 crp1-n buk 55,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 11794714533488983,

Yamaha 1LU-11637-00 Is Similar To:

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2 offers $145.99–$191.07 USD
  • Offer #1: $145.99 price + $0.00 shipping estimate = $145.99* total. Fits: Fits 1986 Yamaha YZ250 New genuine Yamaha OEM 0.75 3rd oversize piston, part number , for the 1986 YZ250.FREE SHIPPING
  • Offer #2: $191.07 price + $0.00 shipping estimate = $191.07* total.FREE SHIPPING

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