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  3. YAMAHA 166-11635-00-00

YAMAHA 166-11635-00-00 Nos Piston .25 L5T YL2 67-69

fits model: Ylcm. make: Yamaha.

166-11635-00-00 Yamaha Nos Oem Piston .25 1st Over L5t Yl2 Ylcm 67-69 166-11635

( Engine Type: 2-stroke ), ( Type: Piston ), ( Unit Type: Unit ), ( Machine Type: Street Motorcycle ), ( Items Included: Piston Rings ), ( Vintage Part: Yes ), ( Country Of Origin: Japan ), ( UPC: 166116350000 )

Review YAMAHA Nos Oem Piston .25 1st Over L5t Yl2 67-69 166-11635 fits YLCM

Yamaha Replacement Piston for Outboard Motor Model No. 166-11635-00-00 (NOS, 25 L, 5T, YL2, YLCM, 67-69)

Description:

This replacement piston from Yamaha is designed for specific use with outboard motor models YL2 and YLCM, manufactured between model years 67 and 69. The part number for this component is 166-11635-00-00.

The piston is a crucial component in the functioning of the outboard motor's internal combustion engine. It plays a vital role in converting thermal energy into mechanical energy, which ultimately propels the watercraft through the water.

The piston is a 25 L (Liter) unit, meaning it has a displacement capacity of 25 liters, and it is categorized as a 5T piston. This indicates that the piston ring grooves have a total top land circumference of 5 times the piston diameter.

The piston is a new old stock (NOS) item, meaning it is a brand new, unused component that was originally produced during the specified model years. This ensures the highest level of quality and reliability when installing it in your Yamaha outboard motor.

Installation of this piston involves removing the old piston from the engine cylinder, cleaning the cylinder walls and piston crown, and installing the replacement piston with new piston rings and cylinder lubrication.

This replacement piston is a direct fit for the specified Yamaha outboard motor models and is engineered to meet the highest standards of performance and durability. It is essential to follow the manufacturer's instructions carefully during installation to ensure optimal performance and longevity of the component.

By choosing this Yamaha replacement piston, you can restore the power and efficiency of your outboard motor, ensuring a more enjoyable experience on the water.

Pros and Cons of Buying Yamaha 166-11635-00-00 NOS Piston for a Yamaha Outboard Motor

1. Pros:

a. OEM Part: This piston is a genuine replacement part manufactured by Yamaha, ensuring a perfect fit and optimal engine performance.

b. Durability: Yamaha's reputation for producing high-quality components translates to the piston. It is designed to withstand the rigors of marine use, providing long-lasting reliability.

c. Improved Engine Performance: A new piston can help restore engine power and efficiency, improving overall boat performance.

d. Peace of Mind: By using an OEM part, you can have confidence that it meets Yamaha's strict quality standards, potentially reducing the need for further repairs in the future.

2. Cons:

a. Cost: Original equipment manufacturer (OEM) parts can be more expensive than aftermarket alternatives. This piston may be a significant investment for some boat owners.

b. Availability: Depending on the specific model and year of your outboard motor, finding a new OEM piston may take some time and effort.

Conclusion:

The decision to buy a Yamaha 166-11635-00-00 NOS piston for your Yamaha outboard motor depends on your priorities. If you value the peace of mind and engine performance that comes with using an OEM part, and if you are willing to pay the higher price, then this piston is an excellent choice. However, if cost is a concern, and you are willing to take a chance on aftermarket alternatives, then you may want to explore those options instead.

Recommendation:

If you are committed to using OEM parts and have the budget for it, then the Yamaha 166-11635-00-00 NOS piston is a recommended purchase. However, if you are looking for a more cost-effective alternative, consider researching reputable aftermarket suppliers and comparing their offerings to ensure you are getting a quality product. Ultimately, the decision is yours based on your specific needs and preferences.

Details:

L5T YL2 YLCM 1967-69, 1967-69.

part #: 166116350000 prices

  • $12.99-$19.97

specifications pistondon:

  • for models: Ylcm
  • for makes: Yamaha
  • engine type: 2-stroke
  • type: Piston
  • unit type: Unit
  • machine type: Street Motorcycle
  • items included: Piston Rings
  • vintage part: Yes
  • country of origin: Japan
  • upc: 166116350000

offer pistondon:

  • sold: 0
  • started: January 28, 2026
  • options: Ship-to-home
  • availability: In Stock
  • quantity: 3

seller pistondon:

  • # reviews: 13177
  • city: Middleburg, Florida
  • rating: 100.0%

payments pistondon:

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

general pistondon:

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

shipping pistondon:

  • transit: 5-10 Days
  • service: FedEx Ground Economy, USPS Ground Advantage, UPS Ground, USPS Priority Mail
  • class: Economy, Standard, Expedited
  • type: Calculated
  • cost: $6.90
  • carrier: FedEx, USPS, UPS

returns pistondon:

  • time: 60 Days
  • policy: Returns Accepted
  • paid by: Seller
for models: ylcm, for makes: yamaha, engine type: 2-stroke, type: piston, unit type: unit, machine type: street motorcycle, items included: piston rings, vintage part: yes, country of origin: japan,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, sku: 10255429535160891,

Yamaha 166-11635-00-00 Is Similar To:

pistondon logo
2 offers $12.99–$19.97 USD
  • Offer #1: $12.99 price + $5.72 shipping estimate = $18.71* total. YL2C 1967 100 YL2C Trailmaster 100 Dual-Purpose. YL2CM 1968 100 YL2CM Trailmaster 100 Dual-Purpose.+$5.72 shipping
  • Offer #2: $19.97 price + $6.90 shipping estimate = $26.87* total. 25 1ST OVER HT1 70-71 276-11635. L5T YL2 YLCM 1967-69.+$6.90 shipping

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