YAMAHA 401-11636-00-00 Nos Piston .50

( Engine Type: 2-stroke ), ( Type: Piston ), ( Machine Type: Off-road Motorcycle ), ( Items Included: Piston Rings ), ( Vintage Part: Yes ), ( Country Of Origin: Japan ), ( UPC: 401116360000 )

Review YAMAHA Nos .50 Piston Pt# fits PT MX125 MX 125 1974-75

Yamaha MX125 MX-1 Motor, 1974-75 (Part No: 401-11636-00-00)

The Yamaha MX125 MX-1 Motor, a legendary piece of two-wheel history, is represented by part number 401-11636-00-00. This motor was a key component of Yamaha's MX125 MX-1 dirt bike, which was in production from 1974 to 1975.

This air-cooled, single-cylinder, two-stroke motor boasts a displacement of 125cc and a bore and stroke measurement of 52.5mm x 58.7mm. Its compression ratio is 6.8:1, which provides ample power and torque for off-road riding conditions.

The engine is equipped with a Mikuni VM18 carburetor, which ensures a smooth and consistent fuel-air mixture for optimal combustion. The motor features a reed valve induction system, which allows for efficient intake and exhaust processes.

The Yamaha MX125 MX-1 Motor is known for its robust design and durability. Its crankshaft is made from high-strength steel, and its piston is made from a lightweight aluminum alloy. The motor also features a forged connecting rod and a reinforced clutch assembly to handle the rigors of off-road riding.

The motor comes with an electric starter system, which makes starting the bike easy, even in challenging conditions. It also features a kickstarter backup system, providing an added level of reliability.

The Yamaha MX125 MX-1 Motor is a must-have for collectors, restorers, or enthusiasts of vintage dirt bikes. Its iconic design and powerful performance make it a highly desirable addition to any motorcycle collection.

- Displacement: 125cc

- Bore and Stroke: 52.5mm x 58.7mm

- Compression Ratio: 6.8:1

- Carburetor: Mikuni VM18

- Induction System: Reed Valve

- Starting System: Electric Starter with Kickstarter Backup.

Please note that this motor may require additional parts or modifications to be used as a drop-in replacement on modern motorcycles. It is recommended to consult with a professional mechanic or Yamaha dealer for installation and compatibility questions.

The Yamaha 401-11636-00-00, which is a part number for a 50 piston mx125 mx 125 engine manufactured by Yamaha in 1974-75, can be a worthy investment for certain applications. Here are some pros and cons to help you make an informed decision:

1. Vintage Appeal: This engine is a piece of motorcycling history. It has a classic look and can be a great addition to a vintage motorcycle collection.

2. Versatility: These engines were used in various applications, including go-karts, mini-bikes, and even some small aircraft. They are known for their durability and reliability, making them a popular choice for those applications.

3. Availability of Spare Parts: Since these engines were produced in large numbers, spare parts are generally readily available.

4. Affordability: Compared to new engines, used engines like this one are often more affordable.

1. Age-Related Issues: These engines are quite old, and as such, they may require more maintenance and repairs compared to newer engines.

2. Compatibility: Depending on the specific application, these engines may not be compatible without modifications.

3. Fuel Efficiency: Older engines like the Yamaha 401-11636-00-00 may not be as fuel-efficient as newer engines.

4. Emissions: These engines do not meet modern emissions standards, which may limit their use in certain areas.

The Yamaha 401-11636-00-00 can be a great investment for those looking for a vintage engine with a rich history. However, it may come with some age-related issues and compatibility concerns. If you are looking for an engine for a specific application and are willing to put in the necessary maintenance, then this engine could be a good choice. On the other hand, if you are looking for a modern, fuel-efficient, and emission-compliant engine, then you may want to consider other options.

If you are looking for a vintage engine with a classic look and a rich history, then the Yamaha 401-11636-00-00 could be a good choice. However, be prepared for potential maintenance and compatibility issues. It is recommended that you thoroughly research the engine's compatibility with your specific application and consider the availability and cost of spare parts before making a purchase.

Details:

THE PART NUBER IS 401-11636-00-00. FACTORY OEM NOS YAMAHA .50 O/S PISTON MX125 1974-1975.

part #: 401116360000 prices

• $12.99-$29.95

specifications pistondon:

• for models: Mx125, Mx, 125, Pt
• for makes: Yamaha
• for years: 1974-75
• engine type: 2-stroke
• type: Piston
• machine type: Off-road Motorcycle
• items included: Piston Rings
• vintage part: Yes
• country of origin: Japan
• upc: 401116360000

payments pistondon:

• other
• wallet: Paypal
• credit card: Diners-club

offer pistondon:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 1
• started: January 15, 2026

seller pistondon:

• city: Middleburg, Florida
• # reviews: 13152
• rating: 100.0%

shipping pistondon:

• type: Calculated
• cost: $14.90
• class: Standard, Economy, Expedited
• service: USPS Ground Advantage, FedEx Ground Economy, USPS Priority Mail, FedEx Ground / FedEx Home Delivery
• transit: 6-13 Days
• carrier: USPS, FedEx

general pistondon:

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

returns pistondon:

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

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