YAMAHA 278-11637-09-00 Piston .75 .030

( Engine Type: 2-stroke ), ( Type: Piston ), ( Machine Type: Street Motorcycle ), ( Vintage Part: No ), ( Country/region Of Manufacture: Japan ), ( UPC: 278116370900 )

Review YAMAHA .75mm Oversize Piston .030 fits R5 1970–1972

Yamaha R5 1970-1972, 75 Piston Carbureted Air-Cooled Motorcycle Engine (Part No: 278-11637-09-00)

The Yamaha R5 motorcycle engine, with part number 278-11637-09-00, is an iconic component of the legendary Yamaha R5 motorbikes used between 1970 and 1972. This 75 piston, carbureted, air-cooled engine showcases Yamaha's commitment to innovation, power, and reliability during the golden era of motorcycling.

The engine boasts a distinctive 5-valve SOHC design, featuring an overhead camshaft driving the intake valves via pushrods and rocker arms. This design enhances combustion efficiency and provides increasing power output, pushing the boundaries of performance for the time. The entire engine is air-cooled, which is in contrast to the more contemporary liquid-cooled engines, but is classic and gives the R5 motorcycle its distinct character.

The 278-11637-09-00 consists of a 495cc displacement, 4-stroke single cylinder, OHV engine with 5-speed constant mesh transmission. Each cylinder contains 75mm x 66.2mm bore and stroke dimensions. This power plant features 11:1 compression ratio and is fed by twin Mikuni carburetors. The engine is capable of producing approximately 45 horsepower at 7500 RPM, providing impressive power for its time.

Offering smooth and responsive power delivery, the Yamaha R5 1970-1972 engine is perfect for both city riding and long distance tours. The torque curves of these engines provide sufficient low-end grunt for urban riding conditions, complemented by a great top-end power for open-road adventures.

This 75 piston motorcycle engine is known for its robustness and user-friendly maintenance. With a simple design and a relatively few moving parts, it is easier to maintain compared to more complex, modern motorcycle engines. It can be a challenging yet rewarding project for those looking to delve into the world of vintage motorcycling.

In summary, the Yamaha R5 278-11637-09-09-00 engine represents a pinnacle in motorcycling history. Its classic design, combined with innovative features like the 5-valve OHC, made it a standout performer in its era. It continues to be sought after by collectors and enthusiasts alike, both for its power and the unique motorcycling experience it offers.

The Yamaha R5 030, with the model number Yamaha 278-11637-09-00, is an older motorcycle engine produced by Yamaha Motor Company for their R5 motorcycles from 1970 to 1972. Here are some pros and cons to consider before deciding to buy this engine.

1. Authenticity: This is an original engine for a classic motorcycle. Collectors and enthusiasts value these engines due to their historical significance and authenticity. Restoring an original engine adds to a motorcycle's value.

2. Better Part Availability: Since this engine is still in production for use in classic motorcycles, you can easily find parts for it. You'll be able to keep it running and maintain it as needed.

3. Smooth Performance: 75 piston engines offer smooth and reliable performance. They have a good power-to-weight ratio and are known for their responsiveness.

4. Cost-effective Solution: For collectors or enthusiasts aiming for a reasonable budget, this engine could be a cost-effective solution as they are often less expensive than buying a completely restored motorcycle.

1. Obsolete Technology: The Yamaha R5 030 engine uses obsolete technology, meaning it may require specific tools and expertise for repairs and maintenance. Also, aftermarket parts and improvements may not be widely available.

2. Higher Maintenance Needs: Older engines generally require more maintenance compared to modern engines. You may spend more time and money on routine repairs and replacement parts.

3. Fuel Efficiency: Older engines, including the Yamaha R5 030, can be less fuel-efficient compared to modern engines. This is a consideration for those concerned with environmental impact or fuel costs.

4. Limited Compatibility: This engine is compatible specifically with the 1970-1972 Yamaha R5 motorcycles, which may limit its potential uses or applications.

If you are a collector, restorer, or enthusiast looking for a classic motorcycle experience and prioritize authenticity and originality, the Yamaha R5 030 engine may be an excellent investment for you. Be prepared to account for potential challenges and additional time and cost for maintenance, as well as limitations in compatibility and access to aftermarket improvements.

Consider your experience level, budget, and desired use for this engine before making the purchase. If you're confident in your mechanical abilities, prepared for the challenges that come with owning an older engine, and passionate about classic motorcycles, the Yamaha R5 030 engine could be a rewarding investment. However, if you prefer modern technology, minimal maintenance, or a broader range of applications, you might want to consider other engine options.

Details:

Fitment: R5 - 1970 R5B 1971 R5C 1972, 1972. You are buying on: .75mm Oversize Piston, Parts in this listing fit: 1970-1972 Yamaha R5, condition: Used, Details: Good used part. Overall in nice shape. Comes as shown.

I don't see any carbon deposits, and very light regular wear from movement up down in a cylinder. Looks to be almost new with very little use.

part #: 278116370900 prices

• $26.99-$45.68

specifications pistondon:

• for models: R5
• for makes: Yamaha
• for years: 1970-1972
• engine type: 2-stroke
• type: Piston
• machine type: Street Motorcycle
• vintage part: No
• country/region of manufacture: Japan
• upc: 278116370900

payments pistondon:

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

offer pistondon:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: November 8, 2024
• quantity: 1

shipping pistondon:

• transit: 6-11 Days
• cost: $12.10
• type: Calculated
• class: Standard
• service: USPS Ground Advantage
• carrier: USPS

seller pistondon:

• city: Provo, Utah
• rating: 99.0%
• # reviews: 2938

returns pistondon:

• policy: No Returns

general pistondon:

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

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