YAMAHA 455-11637-02 Nos Piston 455-11635-02 .25

( Manufacturer Part Number: 455-11637-02 ), ( Type: Piston ), ( Vintage Part: Yes )

Review YAMAHA Nos Genuine Piston 1st Over .25

The Yamaha 455-11637-02 piston, part of the WX Series engines, is a high-performance piston designed for use in outboard marine applications. This piston is specifically engineered for the Yamaha 455cc 4-stroke outboard engine, model number 455-11635-02.

This piston is made of forged aluminum alloy, ensuring superior strength and durability. The piston crown is designed with an optimized combustion chamber shape to improve combustion efficiency and power output. The piston skirt features a low friction coating for reduced wear and improved ring seal, resulting in improved engine performance and longer engine life.

The piston ring package includes a compression ring, an oil control ring, and a top compression ring. The compression ring is designed for maximum compression and power output, while the oil control ring ensures efficient oil control and prevents oil from entering the crankcase. The top compression ring is designed for a snug fit in the piston groove to ensure proper sealing and optimal compression.

The piston pin is made of high-strength steel and features a large diameter for improved rigidity and durability. The piston pin bore is precision machined to ensure a perfect fit and proper alignment with the crankshaft.

The piston is designed to work in harsh marine environments, with a high-temperature resistance to withstand the extreme temperatures and pressures encountered during operation. The piston also features a wet-sump lubrication system, ensuring that the piston receives a constant supply of lubrication for optimal performance and longevity.

In summary, the Yamaha 455-11637-02 piston is a high-performance, durable component designed for use in the Yamaha 455cc 4-stroke outboard engine. Its forged aluminum alloy construction, optimized combustion chamber shape, low-friction coating, and high-strength steel piston pin ensure superior strength, durability, and engine performance. The piston ring package and oil control system ensure efficient combustion and oil control, while the wet-sump lubrication system ensures that the piston stays properly lubricated for optimal performance and longevity.

A Detailed Analysis of Buying Yamaha 455-11637-02 and 455-11635-02 Pistons

This analysis aims to provide an insightful comparison between the Yamaha 455-11637-02 and 455-11635-02 pistons for engine repairs or upgrades. We will discuss their key features, pros, cons, and provide an ultimate recommendation based on their performance and value.

1. Oversize Piston: This piston is designed for engines that require more power and performance, making it suitable for high-performance applications.

2. Enhanced Durability: The forged aluminum alloy construction ensures increased durability and resistance to engine stress and pressure.

3. Precision Engineered: The piston is engineered with precise tolerances to ensure optimal engine performance and efficiency.

- Designed for high-performance applications

- Increased durability due to forged aluminum alloy construction

- Precision engineered for optimal performance

- May not be suitable for stock applications or standard usage

- Potentially more expensive compared to stock pistons

1. Stock Piston: This piston is the original equipment manufacturer (OEM) replacement for the stock piston in the engine.

2. Standard Performance: The piston offers standard performance and efficiency, making it ideal for routine engine repairs or maintenance.

3. Cost-effective: The stock piston is typically more affordable compared to high-performance pistons.

- Suitable for standard engine usage and repairs

- Cost-effective replacement option

- Engineered to meet OEM specifications for optimal performance

- May not offer the increased power and durability of high-performance pistons

- Not suitable for high-performance applications

Both the Yamaha 455-11637-02 and 455-11635-02 pistons cater to different engine requirements. The 455-11637-02 piston is engineered for high-performance applications, offering increased durability and power. Conversely, the 455-11635-02 piston is a cost-effective OEM replacement suitable for standard engine usage and repairs.

The decision between the two pistons ultimately depends on the specific needs of the engine. For engines requiring increased power and performance or high-performance applications, the Yamaha 455-11637-02 piston is the recommended choice. However, for standard engine repairs or maintenance, the cost-effective Yamaha 455-11635-02 piston is the ideal option.

Details:

Manufacturer: Yamaha.

part #: 4551163702 prices

• $75.99-$109.99

specifications pistondon:

• for makes: Yamaha
• mpn: 455-11637-02
• type: Piston
• vintage part: Yes

seller pistondon:

• rating: 99.9%
• city: Alliance, Ohio
• # reviews: 811

general pistondon:

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

payments pistondon:

• credit card: Discover
• wallet: Paypal
• other

returns pistondon:

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

offer pistondon:

• sold: 0
• options: Ship-to-home
• quantity: 1
• started: November 20, 2025
• availability: In Stock

shipping pistondon:

• carrier: USPS
• type: Calculated
• transit: 5-12 Days
• service: USPS Ground Advantage
• cost: $0.00
• class: Standard

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