NORTON 18-89424 Pistons Rings .040

( Brand: Norton ), ( Manufacturer Part Number: 18-89424 ), ( Engine Type: 4-stroke ), ( Type: Piston Kit ), ( Items Included: Piston Rings ), ( Vintage Part: Yes )

Review NORTON Pistons .040 Rings fits 850

The Norton 18-89424 piston and ring kit are specifically designed for the 850 cc engines found in classic Norton motorcycles, such as the Atlas, Commando, and Interstate models produced from the late 1960s to the early 1980s. This kit includes both pistons and rings to ensure a complete engine rebuild or replacement.

The pistons are made from a high-quality forged aluminum alloy, ensuring superior strength and durability. Each piston features a flat top design with a compression height of approximately 22.5mm and a total height of 57.5mm. The piston skirts are designed to minimize friction and ensure a snug fit within the engine cylinder.

The piston rings are precision manufactured from a heat-treated steel alloy, ensuring excellent sealing properties and resistance to wear and tear. The kit includes two compression rings, two oil control rings, and two grooved rings. The compression rings are designed to provide a positive seal at the top of the piston, while the oil control rings help prevent oil from leaking past the piston rings and into the crankcase. The grooved rings, also known as scraper rings, help prevent carbon build-up on the piston tops.

The Norton 18-89424 piston and ring kit is designed to be a direct replacement for the original equipment, ensuring easy installation and a seamless integration into the engine. Each component is carefully inspected and tested to meet the highest standards of quality and performance.

In summary, the Norton 18-89424 piston and ring kit is an essential component for any classic Norton motorcycle restoration or rebuild project. With its high-quality materials and precise manufacturing, this kit will help ensure a reliable and long-lasting engine for years to come.

Buying Norton 18-89424 pistons and 850 040 rings for your motorcycle can be a significant investment. Here are some potential pros and cons to consider before making a purchase.

1. High-quality parts: Norton is a reputable brand known for producing high-performance and durable motorcycle parts. These pistons and rings are designed to provide optimal engine performance and reliability.

2. Precision engineered: The pistons and rings are precision engineered to fit perfectly in your motorcycle engine, ensuring a smooth and efficient combustion process.

3. Long-lasting: The materials used in these pistons and rings are designed to withstand the rigors of high-performance riding, making them a long-lasting investment for your motorcycle.

1. Cost: Norton pistons and rings can be more expensive than some aftermarket options. However, the higher cost may be justified by the quality and performance benefits.

2. Availability: Depending on your location, it may be challenging to find a local supplier or dealer that carries these specific pistons and rings. You may need to order them online or through a specialty shop.

3. Installation: Installing pistons and rings can be a complex and time-consuming process. It may require specialized tools and expertise, which could add to the overall cost and complexity of the project.

In conclusion, buying Norton 18-89424 pistons and 850 040 rings can be a worthwhile investment for motorcycle enthusiasts who demand high-performance and reliability from their engines. While the cost and availability may be challenges, the benefits of using high-quality parts from a reputable brand can make the investment worthwhile.

If you are in the market for new pistons and rings for your motorcycle and are willing to invest in high-quality parts, consider purchasing the Norton 18-89424 pistons and 850 040 rings. Be sure to order from a reputable supplier or dealer to ensure authenticity and quality, and consider having them installed by a professional mechanic to ensure proper installation and optimal engine performance.

Details:

Aftermarket Norton 850 .040 piston kit with wrist pins, cir clips and rings.

part #: 1889424 price

• $60.00

specifications pistondon:

• for models: 850
• brand: Norton
• mpn: 18-89424
• engine type: 4-stroke
• type: Piston Kit
• items included: Piston Rings
• vintage part: Yes

seller pistondon:

• # reviews: 0
• city: Churchville, Virginia
• rating: 0.0%

offer pistondon:

• options: Ship-to-home
• started: April 12, 2026
• availability: In Stock
• sold: 0
• best offers: True
• quantity: 1

returns pistondon:

• policy: No Returns

general pistondon:

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

payments pistondon:

• credit card: Mastercard
• other
• wallet: Paypal

shipping pistondon:

• class: Standard
• cost: $5.20
• carrier: USPS
• transit: 4-10 Days
• service: USPS Ground Advantage
• type: Calculated

Norton 18-89424 Is Similar To:

• Hepolite 06-3838 06-4041 Norton Pistons And Rings Set 020 2 Commando 850 1973 1975 (32.8% similar) Fits Norton commando 850 1973 - 1975 . 020 over size current production. Each piston is supplied with 2 compression rings and a one-piece cast-iron oil ring expanded spring wire. 2EA .020 pistons...(February 27th, 2025)
• Hepolite 06-7056 Norton Pistons And Rings Set 020 2 Commando 850 1973 1975 (35% similar) 2EA .020 pistons. Fits Norton commando 750 1968 - 1973 . 020 over size current production. Each piston is supplied with 2 compression rings and a one-piece cast-iron oil ring expanded spring wire...(April 26th, 2025)
• Hepolite 16001 Norton Pistons Lh Rh Std Wristpins Made In Uk (40.8% similar) Pistons and wrist pins only, see photos...(July 21st, 2025)