YAMAHA 509-11635-01 Nos Piston 0.25

( Manufacturer Part Number: 509-11635-01 ), ( Part Type: Piston ), ( Country Of Origin: United States )

Review YAMAHA Nos Oem Piston 0.25 1975 fits MX250 YZ250 1976–1977

Yamaha NOS (New Old Stock) Piston for 1975-1977 MX250 and 1976-1977 YZ250 Motorcycles (Part No. 509-11635-01, 0.25cc)

This is an original Yamaha replacement piston specifically designed for 1975-1977 MX250 and 1976-1977 YZ250 motorcycles. The part number is 509-11635-01, and it is available in a 0.25cc size. This piston is considered New Old Stock (NOS), meaning it is a genuine, authentic, and unused component that was manufactured by Yamaha during the production period of these motorcycles.

The piston is engineered using high-quality materials to ensure optimal engine performance, reliability, and longevity. It features a precise ring land design that maximizes ring sealing, minimizing the risk of blowby and oil consumption. The piston is also meticulously machined to ensure a perfect fit and finish, providing a smooth, efficient transfer of power from the crankshaft to the piston.

This NOS piston is an excellent choice for motorcycle enthusiasts, collectors, or restorers who are looking to maintain or restore their vintage Yamaha MX250 or YZ250 motorcycles to their original condition. Using a genuine Yamaha replacement component ensures that the engine runs at its best and maintains its value.

* Genuine Yamaha replacement component

* Designed for 1975-1977 MX250 and 1976-1977 YZ250 motorcycles

* Part number: 509-11635-01

* 0.25cc size

* New Old Stock (NOS) - unused and authentic

* High-quality materials for optimal engine performance and reliability

* Precise ring land design for effective ring sealing

* Machined for a perfect fit and finish

If you are looking to restore or maintain the engine of your vintage Yamaha MX250 or YZ250 motorcycle, this NOS piston is an essential upgrade. Order yours today and experience the authentic Yamaha performance.

Buying a Yamaha 509-11635-01 piston for a 1975 MX250 or a 1976-1977 YZ250 motorcycle can be a worthwhile investment for those looking to restore or maintain their vintage bikes. Here are some potential pros and cons of making this purchase:

1. Authenticity: Replacing the piston with an original Yamaha part ensures the engine retains its originality, which is important for collectors and purists.

2. Performance: A new piston can lead to improved engine performance, including increased power and better fuel efficiency.

3. Durability: An original Yamaha piston is designed to withstand the specific conditions and stresses of the engine, ensuring longer engine life and reducing the need for frequent repairs or replacements.

1. Cost: Original Yamaha parts, such as pistons, can be more expensive than aftermarket alternatives.

2. Availability: Depending on the rarity of the specific motorcycle model, it may be difficult to find a new or used Yamaha 509-11635-01 piston.

3. Installation: Installing a new piston requires specialized tools and knowledge, which may add to the overall cost and time commitment of the project.

Buying a Yamaha 509-11635-01 piston for a 1975 MX250 or a 1976-1977 YZ250 can be a worthwhile investment for those looking to restore or maintain their vintage bikes. The benefits of using an original Yamaha part include improved engine performance, increased durability, and authenticity. However, the cost, availability, and installation requirements are important considerations. Ultimately, the decision to purchase a new piston depends on the individual's priorities, budget, and expertise.

If you are committed to restoring or maintaining your vintage Yamaha motorcycle with original parts, then investing in a new Yamaha 509-11635-01 piston is a recommended option. However, if cost is a concern or you are comfortable with aftermarket parts, then researching and comparing the quality and compatibility of alternative options may be a viable alternative. Regardless of your decision, it's important to ensure that you are purchasing the correct piston for your specific motorcycle model and year.

Details:

Made in the USA, this high-quality piston is a perfect replacement for those looking to maintain authenticity and performance of their Yamaha motorcycles. With the manufacturer part number 509-11635-01, this piston ensures a precise fit and reliable performance for your engine. YAM PIST BX 5 The product is a genuine Yamaha OEM piston with 0.25mm size, designed for the 1975 MX250 and 1976-1977 YZ250 model's.

part #: 5091163501 prices

• $17.21-$79.85

specifications pistondon:

• for models: Mx250, Yz250
• for makes: Yamaha
• for years: 1976-1977
• mpn: 509-11635-01
• part type: Piston
• country of origin: United States

payments pistondon:

• credit card: Mastercard
• other
• wallet: Apple-pay

general pistondon:

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

shipping pistondon:

• service: USPS Ground Advantage, USPS Priority Mail
• cost: $5.15
• class: Standard, Expedited
• type: Calculated
• transit: 5-9 Days
• carrier: USPS

returns pistondon:

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

seller pistondon:

• city: Houston, Texas
• # reviews: 12
• rating: 100.0%

offer pistondon:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• quantity: 4
• started: November 29, 2025

Yamaha 509-11635-01 Is Similar To:

• Yamaha 2s2-11311-10-00 2009 Yz450f Top End Cylinder Works With Piston E4 (36.2% similar) Came off 09 YZ450F...(May 15th, 2024)
• Yamaha 5ks-11311-00-00 2001 00-03 Vstar 1100 Xvs1100 Classic Piston Cylinder Barrel Front Rear (35% similar) Office use: Lr-KB 01VSTAR1100-001766...(May 15th, 2024)
• Yamaha 1wg 11631-01-00 1989-1990 Fzr400 Oem Piston And Rings 1wg-11631-01-00 (45.1% similar) 55.945MM-55.960MM. Very good condition lightly used oem piston and ring set for 1988 -1990 yamaha FZR400 motorcycle.piston within factory specs...(May 15th, 2024)
• Yamaha 4xv-11631-10-00 2002 02-03 Yzfr1 R1 Engine Motor Piston Lot (39.4% similar) Office use: Lr-DH 02YAMAHAR1-000084...(May 25th, 2024)
• Yamaha 13s-11631-00-00 08-16 Yzf R6 R6r Engine Motor Block Pistons Piston Set 09 10 11 12 13 14 (42.2% similar) Not to mention. Any other shipping preferences aka: FedEx, ups, USPS must be quoted through us. B line motor sports. Have concerns about an order. All parts are backed by our 100% working guarantee or your money back. Don't see an item you are looking for. Please do your research...(June 1st, 2024)
• Yamaha 5jw-11631-00-00 2009 06-12 Fjr1300 Engine Motor Piston Lot (39.7% similar) Office use: Lr-DH 09YAMAHAFJR1300-006151...(June 1st, 2024)
• Yamaha 4mm-11311-01-00 1998 97-07 Yzf600r Yzf600 Thundercat Cylinder Barrel Jug Piston Engine (31.4% similar) Office use: Lr-DH 98YAMAHAYZF600R-002793...(June 3rd, 2024)
• Yamaha 14b-11311-00-00 2009 09-14 R1 Yzfr1 Cylinder Barrel Jug Piston Engine Motor Oem (34.2% similar) Office use: Lr-DH 09YAMAHAYZFR1-003524...(June 4th, 2024)
• Yamaha 1fk-11650-01-00 2004 Vmax 1200 Engine Motor Block Piston Connecting Rod (37.5% similar) R r cycle parts. 2004 yamaha Max 1200 engine motor block piston 1FK-11650-01- this piston is in good condition and shows normal signs of wear. Removed from: 2004 yamaha Max 1200 with 35,972 miles, please review all pictures to assess the condition of item...(June 4th, 2024)
• Yamaha 2ms-e1631-00-00 2017 15-18 Yzfr3 R3 Cylinder Barrel Jug Piston Engine Motor Oem (35.5% similar) Office use: Lr-DH 17YAMAHAR3-002349...(June 4th, 2024)
• Yamaha 14b-11631-00-00 09-14 R1 Yzf1000 Piston Oem (41.4% similar) With 19,858 miles, 09-14 yamaha r1 YZF1000 piston oem 14B-11631-00-00: pulled from a good running bike ready to use as shown in photos. Pulled from a 2013 yamaha R1...(June 6th, 2024)