NAMURA NA-40025K Top End Repair Kit 102.97MM

( Brand: Namura ), ( Manufacturer Part Number: NA-40025K )

Review NAMURA Top End Repair Kit 102.97mm #na-40025k Yamaha

Introducing the Namura NA-40025K Top End Repair Kit, specifically designed for Yamaha engines with a cylinder diameter of 102.97mm. This comprehensive repair kit includes all the essential components needed to refurbish the top end of your Yamaha engine, ensuring optimal performance and longevity.

The heart of this kit is the cylinder kit, featuring a new cylinder liner, piston, and piston ring set. The cylinder liner is precision-machined to ensure a perfect fit and seal, while the piston is made from high-quality aluminum alloy for superior strength and durability. The piston ring set includes the compression ring, oil control ring, and skirt oil control ring, all designed to provide efficient compression and oil control.

Additionally, the Namura NA-40025K Top End Repair Kit includes a new set of piston pin and connecting rod bushings. These bushings help reduce wear and friction between the piston pin and connecting rod, ensuring smooth engine operation. The kit also includes a new set of gaskets, including the head gasket, cylinder head deck gasket, and crankcase gasket, to ensure a proper seal between engine components.

The repair kit also includes new valve guides and valve stem seals to ensure proper valve function and seal. The valve guides are precision-machined to ensure a perfect fit, while the valve stem seals help prevent oil leakage.

Furthermore, the Namura NA-40025K Top End Repair Kit includes new camshaft and crankshaft oil seals to prevent oil leakage from the engine. These seals are made from a high-quality material that ensures a long-lasting seal and prevents oil loss.

Lastly, the kit includes new timing belt idler pulleys and water pump pulleys. These pulleys help ensure proper timing belt and water pump function, which is crucial for engine performance and cooling.

In conclusion, the Namura NA-40025K Top End Repair Kit is a complete solution for Yamaha engine top end repairs, featuring high-quality components designed to ensure optimal performance and longevity. With this kit, you can restore your Yamaha engine to its former glory, reducing downtime and saving you money on costly engine replacements.

Pros and Cons of buying a NAMURA NA-40025K Top End Repair Kit for Yamaha Motorcycles

The NAMURA NA-40025K Top End Repair Kit is a popular choice for Yamaha motorcycle owners seeking to perform top end rebuilds on their engines. Like any purchase, it's essential to weigh the pros and cons before making a decision.

1. High-quality components: The NAMURA repair kit is known for its premium-grade materials, ensuring durability and reliability.

2. Comprehensive kit: The kit includes all the necessary parts required for a top end rebuild, reducing the need for additional purchases.

3. Cost-effective: Compared to the cost of professional rebuilds or purchasing parts separately, this kit can save motorcycle owners a significant amount of money.

4. Easy-to-follow instructions: The kit comes with detailed instructions, making the repair process more accessible for DIY enthusiasts.

1. Learning curve: Top end rebuilds can be complex, and this kit is best suited for those with experience in motorcycle engine repair.

2. Time-consuming: The repair process can take several hours, depending on the rider's experience and the extent of the engine damage.

3. Potential for errors: Improper installation of parts can lead to engine issues, making it crucial to follow instructions carefully and accurately.

4. Limited compatibility: This kit is specifically designed for Yamaha engines, so it may not be suitable for other motorcycle brands.

The NAMURA NA-40025K Top End Repair Kit offers several advantages, including high-quality components, cost-effectiveness, and a comprehensive set of parts. However, it also comes with some challenges, such as a learning curve, potential for errors, and limited compatibility. Ultimately, the decision to purchase this kit depends on the rider's experience, budget, and specific motorcycle needs.

For motorcycle enthusiasts with experience in engine repair and a Yamaha motorcycle in need of a top end rebuild, the NAMURA NA-40025K Top End Repair Kit is an excellent investment. For those less experienced or unsure about the repair process, it may be wiser to consult a professional mechanic.

part # na40025k prices

• $159.36-$208.16

specifications atvsienna:

• for makes: Yamaha
• brand: Namura
• manufacturer part number: NA-40025K

general atvsienna:

• condition: New
• ATV, Side-by-Side UTV Parts Accessories > Engines Engine Parts > Other Engine Parts

offer atvsienna:

• quantity: 2
• started: May 12, 2026
• sold: 0
• availability: In Stock
• options: Ship-to-home

payments atvsienna:

• wallet: Paypal
• credit card: Mastercard
• other

returns atvsienna:

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

seller atvsienna:

• rating: 99.8%
• # reviews: 712771

shipping atvsienna:

• cost: $0.00
• transit: 2-4 Days
• carrier: UPS
• service: UPS Ground
• class: Standard
• type: Fixed

Namura NA-40025K Is Similar To:

• Yamaha 22k-11311-02 Genuine 1985-2008 Badger Moto-4 Raptor 80 Cylinder Jug Namura Piston Kit (15.2% similar) $32.89–$59.95. (October 21st, 2024)
• Namura Atpi-su591963-69 2003-2008 Suzuki Ltz400 Atv Piston Kit 11.3 1 Std Comp / 89.96mm (31.2% similar) $93.50–$107.61. (December 13th, 2024)
• Namura Technologies 9361-n411300-atv Piston Kit-std Bore 96.57mm For 2011-2014 Polaris Sportsman 550 Eps (35.3% similar) $84.76–$137.26. (December 15th, 2024)
• Namura Ra-40003 Connecting Rod For 2002-05 Yamaha Yfm660r Raptor (43.1% similar) $89.95–$137.65. (December 16th, 2024)
• Namura Atpi-po378843-32 2003-2013 Polaris Boss 330 Atv Piston Kit 79.45mm (34.5% similar) $82.40. (December 16th, 2024)
• Namura Atpi-ho578307-62 1998-2004 Honda Trx450 Fe Foreman Atv Piston Kit 90.96mm (35.6% similar) $95.19. (December 19th, 2024)
• Namura Na-40001-4 .040 Over Bore Piston Kit For Yamaha 1987-2006 Banshee 350 Yfz350 65.00mm (40.8% similar) $79.71–$155.16. (December 20th, 2024)
• Namura Na-10042-8 No Pin .080 Over Bore Piston Kit For Honda Fits Rancher 420 88.5mm -no Wrist Pin (36.6% similar) $69.99–$106.51. (December 21st, 2024)
• Namura Technologies Mn/3qja Piston Ring Set For 2009-2013 Kawasaki Krf750 Teryx Fi 4x4 Sport - Xo (25.8% similar) $28.03. (December 22nd, 2024)
• Namura Technologies Na-30000-4k Piston Kit 1.00mm Oversize To 66.97mm 186-30004 (42.8% similar) $76.73–$92.19. (December 24th, 2024)
• Namura Na-40010f Missing Piece Gasket Kit For Yamaha Rhino 660 And Grizzly Missing Piece (39% similar) $59.95–$103.88. (December 25th, 2024)