YAMAHA 401-11611-31 Piston Ring .75

( Manufacturer Part Number: 401-11611-31 ), ( Part Type: Ring Piston ), ( Country Of Origin: United States ), ( Manufacturer Warranty: Unspecified Length ), ( Storage Location: K6 Mot-n Buk 46 Bin 1 )

Review YAMAHA Oem .75 Oversize Piston Ring fits MX125 YZ125 1974–1977

Yamaha 1974-1977 MX125 YZ125 75cc Replacement Piston Ring Set

This piston ring set is specifically designed for the Yamaha MX125 and YZ125 motorcycles produced between the years 1974 and 1977, featuring a 75cc engine. The piston rings play a crucial role in the engine's performance and durability, ensuring a tight seal between the piston and cylinder walls to prevent the loss of compression and combustion gases.

The set includes all necessary piston rings for the engine, including the compression ring, oil control ring, and two piston rings. Each ring is meticulously crafted from high-quality materials to provide superior sealing performance, longevity, and resistance to wear and tear.

The compression ring, located at the bottom of the piston, is responsible for creating the pressure necessary for the engine to run efficiently. This ring is designed to provide maximum compression and minimal friction for optimal power transfer.

The oil control ring, positioned above the compression ring, helps regulate the flow of engine oil to the piston skirt. This ensures that the engine receives the appropriate amount of lubrication while minimizing oil consumption and engine wear.

The remaining two piston rings are used to seal the piston to the cylinder walls and prevent the loss of gases. These rings are precision engineered to ensure a perfect fit and seal, providing improved engine efficiency, power output, and overall performance.

Installing these piston rings is a straightforward process that can be accomplished with common hand tools. However, it is highly recommended that the installation be performed by a professional mechanic to ensure proper installation and alignment for optimal engine performance.

By choosing this Yamaha 1974-1977 MX125 YZ125 75cc Replacement Piston Ring Set, you are investing in the long-term health and performance of your motorcycle's engine. These high-quality piston rings are designed to provide superior sealing, improved efficiency, and increased durability, ensuring that your Yamaha MX125 or YZ125 continues to perform at its best.

The Yamaha MX125 and YZ125 motorcycles produced between 1974 and 1977 were popular choices for off-road racing enthusiasts. These bikes came with a 125cc two-stroke engine that required regular maintenance, including the replacement of piston rings. Here are some pros and cons of buying a new set of piston rings for a Yamaha MX125 or YZ125.

1. Improved engine performance: New piston rings can help improve the engine's sealing and reduce compressions losses, leading to better power output and improved overall performance.

2. Extended engine life: Worn-out piston rings can cause engine damage over time, so replacing them can help prevent costly repairs and extend the life of the engine.

3. Smoother engine operation: New piston rings can help reduce engine noise and vibration, leading to a smoother and more enjoyable riding experience.

1. Cost: Replacing piston rings can be an expensive proposition, especially if you're working on an older bike that may require other repairs as well.

2. Labor costs: If you're not comfortable doing the work yourself, you'll need to pay a mechanic to install the new rings, which can add to the overall cost.

3. Availability: Finding the exact piston rings for your specific model and year of Yamaha MX125 or YZ125 can be a challenge, and you may need to order them online or from a specialized parts supplier.

In conclusion, while replacing piston rings on a Yamaha MX125 or YZ125 can be a costly and time-consuming process, the potential benefits in terms of improved engine performance, extended engine life, and smoother operation make it a worthwhile investment for serious off-road riders. If you're not comfortable doing the work yourself, consider finding a reputable mechanic to help you out.

Recommendation: If you own a Yamaha MX125 or YZ125 and are experiencing engine issues or simply want to ensure optimal performance, consider investing in a new set of piston rings. While the upfront cost may be significant, the potential benefits in terms of improved engine performance, extended engine life, and smoother operation make it a worthwhile investment for serious off-road riders.

Details:

This genuine Yamaha OEM .75 oversize piston ring is ideal for rebuilding 125cc and 175cc two-stroke engines. Ensures proper compression and extends engine life. Spotlight: A Day Inside . Fits: 1974 Yamaha MX125.

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part #: 4011161131 prices

• $19.98-$39.00

specifications pistondon:

• for models: Mx125, Yz125
• for makes: Yamaha
• for years: 1974-1977
• mpn: 401-11611-31
• part type: Ring Piston
• country of origin: United States
• manufacturer warranty: Unspecified Length
• storage location: K6 Mot-n Buk 46 Bin 1

payments pistondon:

• credit card: Discover
• wallet: Paypal
• other

offer pistondon:

• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: February 5, 2026
• quantity: 1

shipping pistondon:

• carrier: USPS, FedEx
• class: Standard, Expedited, One-day
• transit: 5-8 Days
• cost: $0.00
• type: Fixed
• service: USPS Ground Advantage, USPS Priority Mail, FedEx 2Day, Overnight

general pistondon:

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

seller pistondon:

• # reviews: 208680
• city: Odessa, Florida
• rating: 99.3%

returns pistondon:

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

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