1. Pistons, Rings & Piston Kits Products
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  3. YAMAHA 39W-11630-41

YAMAHA 39W-11630-41 Piston Kit Nos 1MM 4TH

fits model: Yz125. make: Yamaha. year: 1983–1984.

39w-11630-41 Yamaha 83-84 Yz125 Piston Kit 1mm 4th Os Genuine Nos

( Manufacturer Part Number: 39W-11630-41 ), ( Type: Piston Kit ), ( Country Of Origin: United States ), ( Color: Red ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: G6 Zsc3-n Buk 15 )

Review YAMAHA Piston Kit 1mm 4th Os Genuine Nos fits YZ125 1983–1984

The Yamaha 39W-11630-41 83-84 YZ125 Piston Kit is an essential upgrade for any enthusiast or professional working on a Yamaha YZ125 motorcycle from the 1983-1984 model years. This piston kit, manufactured by Yamaha, is specifically designed to deliver superior performance, reliability, and durability for your two-stroke motorcycle.

The piston kit includes four new pistons, each crafted from high-quality materials to ensure optimal engine function. The pistons are engineered to fit perfectly in the engine of your YZ125, ensuring a seamless installation process. Each piston is designed with a 1mm overbore, which increases the engine's displacement and enhances power output.

The piston kit also features a compression ring set that is specifically designed to work with the new pistons. These compression rings are designed to provide optimal seal and compression for the new pistons, ensuring efficient combustion and maximum power output.

The piston rings in this kit are made of a high-temperature resistant material that can withstand the extreme temperatures generated during engine operation. This ensures that the rings will not wear out quickly and will provide long-lasting performance.

The piston kit is also designed to work with the original crankshaft and connecting rod, making it a cost-effective solution for those seeking to upgrade their engine without having to replace other major components.

In summary, the Yamaha 39W-11630-41 83-84 YZ125 Piston Kit is an excellent investment for any Yamaha YZ125 motorcycle owner from the 1983-1984 model years. With its high-quality materials, precise fitment, and performance enhancements, this piston kit is sure to provide superior power output, reliability, and durability for your motorcycle.

Buying Yamaha 39W-11630-41 83-84 YZ125 Piston Kit: A Comprehensive Analysis

Introduction:

The Yamaha 39W-11630-41 83-84 YZ125 Piston Kit is a replacement part for Yamaha YZ125 motorcycles manufactured between 1983 and 1984. This piston kit comes in a 1mm oversize and is the fourth new one. In this analysis, we will discuss the potential advantages and disadvantages of purchasing this piston kit for your Yamaha YZ125.

Pros:

1. OEM (Original Equipment Manufacturer) Compatibility: This piston kit is manufactured by Yamaha, ensuring perfect compatibility with your motorcycle.

2. Improved Performance: A new piston kit can lead to improved engine performance, including increased power and torque.

3. Wear and Tear: If your motorcycle has high mileage, a worn-out piston kit can lead to significant engine damage. Replacing it with a new one can help prevent further damage.

4. Smoother Engine Operation: A new piston kit can result in smoother engine operation, reducing vibrations and noise.

5. Peace of Mind: Investing in a new piston kit can provide peace of mind, knowing that your engine components are in good condition.

Cons:

1. Cost: Replacing a piston kit can be quite expensive, especially if you are not mechanically inclined and need to pay for labor costs.

2. Availability: Depending on the availability of the part, it may take some time to receive the piston kit, potentially leaving your motorcycle out of commission for an extended period.

3. Installation Complexity: Installing a piston kit can be a complex process, requiring specialized tools and expertise. If you are not comfortable with the installation process, it is recommended to seek professional help.

Conclusion:

The Yamaha 39W-11630-41 83-84 YZ125 Piston Kit is an essential replacement part for Yamaha YZ125 motorcycles manufactured between 1983 and 1984. While it comes with some disadvantages, such as cost and installation complexity, the advantages, including OEM compatibility, improved performance, wear and tear prevention, smoother engine operation, and peace of mind, make it a worthwhile investment for those seeking optimal engine performance and longevity.

Recommendation:

If you own a Yamaha YZ125 motorcycle from the specified period and suspect that your piston kit is worn out or damaged, consider investing in the Yamaha 39W-11630-41 83-84 YZ125 Piston Kit. While it may require a significant financial investment and professional installation, the potential benefits, including improved engine performance, smoother operation, and peace of mind, make it a worthwhile investment for enthusiasts and riders alike.

Details:

One-Of-A-Kind When Its Gone, Gone 83-84 Yamaha YZ125 Piston Kit 1MM 4TH OS Genuine NOS 39W-11630-41:: This is a genuine New Old Stock NOS piston kit, 1.00mm 4th oversize, designed for vintage motocross restoration. Every part is one-of-a-kind. Yamaha Cruisers. FREE shipping on every order to the lower 48 states.

We started with a single motorcycle dismantled in home garage. Do you accept offers?, Some listings offers. It includes the piston, rings, pin, and clips required for a top-end rebuild. Please verify the part number and compatible model's before purchasing.

Look for the Make Offer button on listing page. Item must be in original, uninstalled condition with no modifications. To Watch. Fits: 1983 1984 Yamaha YZ125, Fitment, Fits YZ125 Spotlight: A Day Inside .

Are these genuine OEM parts?, Yes. Do you combine shipping?, Yes. We review all reasonable offers promptly. 4.8 out of 5 stars across 322 reviews.

Yamaha MX / ATV.

part #: 39w1163041 prices

  • $109.88-$185.50

specifications pistondon:

  • for models: Yz125
  • for makes: Yamaha
  • for years: 1983-1984
  • mpn: 39w-11630-41
  • type: Piston Kit
  • country of origin: United States
  • color: Red
  • manufacturer warranty: Unspecified Length
  • storage location: G6 Zsc3-n Buk 15

offer pistondon:

  • availability: In Stock
  • sold: 0
  • started: May 19, 2026
  • options: Ship-to-home
  • quantity: 1

general pistondon:

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

returns pistondon:

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

seller pistondon:

  • # reviews: 230794
  • rating: 99.5%
  • city: Odessa, Florida

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  • carrier: FedEx, USPS
  • type: Fixed
  • service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, FedEx 2Day, Overnight
  • cost: $0.00
  • class: Standard, Expedited, One-day
  • transit: 3-9 Days

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for models: yz125, for makes: yamaha, for years: 1983-1984, type: piston kit, country of origin: united states, manufacturer warranty: unspecified length, storage location: g6 zsc3-n buk 15,
category: motorcycle parts > motorcycle scooter parts accessories > engines engine parts > pistons, rings piston kits, color: red, sku: 12473542241140008,

Yamaha 39W-11630-41 Is Similar To:

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4 offers $109.88–$185.50 USD
  • Offer #1: $109.88 price + $0.00 shipping estimate = $109.88* total. Yamaha Cruisers 1983-1984 Yamaha YZ125.FREE SHIPPING
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  • Offer #3: $185.50 price + $11.35 shipping estimate = $196.85* total. YAMAHA PART # -00. NOS YAMAHA PISTON KIT 1MM OVERSIZE.+$11.35 shipping
  • Offer #4: $129.00 price + $0.00 shipping estimate = $129.00* total. I take good quality pics so you'll know exactly what you're getting New old stock oem Yamaha piston kit.FREE SHIPPING

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