5249-W323018-29 WSM Top End Waverunner Kit GP800 Std Yamaha

Review WSM Top End Kit-std. Bore 79.90mm For Yamaha Waverunner for YAMAHA GP800 STD 1998–2000

Introducing the WSM 5249-W323018-29 Top End Kit, specifically designed for Yamaha GP800 Waverunners manufactured between 1998 and 2000. This top-tier performance upgrade is an excellent investment for those seeking to enhance the power and overall riding experience of their watercraft.

The WSM Top End Kit comes with three high-performance cylinder heads, each featuring large intake and exhaust ports for improved flow rates. These ports are machined to precision, ensuring a perfect fit and optimal engine performance. The cylinder heads also include upgraded valves and springs, designed to provide increased lift and improved engine breathing for better power output.

The intake manifold included in this kit is made from lightweight and durable aluminum material. Its design provides improved flow characteristics, ensuring an efficient fuel-air mixture for optimal combustion. The manifold's precise machining ensures a perfect fit and seamless integration with the engine.

The WSM Top End Kit also includes a new set of high-performance camshafts, which provide increased lift and duration for improved engine power and torque. The camshafts are meticulously ground and balanced to ensure precise timing and smooth engine operation.

Additionally, this kit comes with new pistons, rings, and cylinder sleeves. The pistons are made from a high-strength aluminum alloy and feature a streamlined design for improved efficiency and durability. The rings are made from a high-tensile material and feature a low-friction coating for improved ring sealing and reduced engine wear. The cylinder sleeves are made from a high-quality material that provides excellent thermal conductivity and wear resistance.

Installing the WSM Top End Kit requires no major engine modifications, making it a straightforward upgrade for the DIY enthusiast. It is recommended that the installation be performed by a professional to ensure proper installation and optimal engine performance.

In summary, the WSM 5249-W323018-29 Top End Kit is an exceptional performance upgrade for Yamaha GP800 Waverunners from 1998 to 2000. It includes high-performance cylinder heads, an aluminum intake manifold, high-performance camshafts, and new pistons, rings, and cylinder sleeves. This kit delivers increased power, improved engine breathing, and enhanced overall riding experience.

The WSM 5249-W323018-29 Top End Kit is a performance upgrade for the 1998-2000 Yamaha GP800 Waverunner. This kit is designed to enhance the engine's power and overall performance. Here are some pros and cons to help you decide if this upgrade is right for you.

1. Increased Horsepower: The top end kit is designed to increase the horsepower of the GP800 engine, providing more power for acceleration and top speed.

2. Improved Engine Response: The kit's high-performance cylinder head and intake system improve the engine's response time, making the waverunner more responsive and agile.

3. Better Fuel Efficiency: The top end kit can improve the engine's fuel efficiency by optimizing the fuel-air mixture, resulting in better fuel economy and longer runs between fill-ups.

4. Enhanced Exhaust System: The kit comes with a high-performance exhaust system that improves engine performance and reduces exhaust emissions.

1. Cost: The top end kit is a significant investment, with a price tag of around $799.

2. Installation Complexity: Installing the top end kit requires some mechanical knowledge and skills, and the process can be time-consuming and labor-intensive.

3. Warranty Issues: Installing aftermarket parts like the top end kit can void the original manufacturer's warranty on the waverunner.

4. Potential for Increased Noise: The high-performance exhaust system can produce more noise than the stock exhaust, which may not be desirable for all users.

The WSM 5249-W323018-29 Top End Kit is an excellent performance upgrade for the 1998-2000 Yamaha GP800 Waverunner, offering increased horsepower, improved engine response, better fuel efficiency, and an enhanced exhaust system. However, it comes with a high cost, installation complexity, potential warranty issues, and increased noise.

If you're an experienced waverunner owner looking for maximum performance and don't mind the investment and installation complexities, the WSM 5249-W323018-29 Top End Kit is an excellent choice. However, if you're a casual user or new to waverunners, you may want to consider other upgrades or wait until you have more experience before investing in this high-performance kit.

Details:

This is helpful if you are buying multiple items.: brand: Wsm, model number: 5249-W323018-29. Piston walls are treated with a nonabrasive coating which reduces heat and friction for extended life. Compatibility: years: make: model: application: notes: 1998 - 2000 Yamahagp800 waverunner gp8 2001 2005 Yamahagp800a GP800r, 2002 2004 Yamahaxa800a xlt8 2000 2001 Yamahaxa800 xl800.

Parts without fitment are to be assumed universal and may require vehicle modification. Wsm top end kit-std. Wsm platinum series top-end kit contains: top-end gaskets and pistons to rebuild one motor piston bore size: 79.90mm, actual contents may vary from photo, pistons are made of high strength hardened aluminum. They are designed to prevent skirt and ring groove breakage.

I need to exchange an item. Bore 79.90mm for 1998 - 2000 Yamaha GP800 waverunner GP800: bore: 79.90mm, sizing: standard.

specifications watercraftimp:

• for models: Gp800, Std
• for makes: Yamaha
• for years: 1998–2000
• brand: Wsm
• mpn: 5249-w323018-29

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

shipping watercraftimp:

• class: standard
• service: standard
• transit: 3-5 days
• type: fixed

offer watercraftimp:

• sold #: 27
• started: april 26, 2025
• options: ship-to-home
• availability: in stock
• prices: $290.48–$330.59
• item condition: New
• in stock #: 5

returns watercraftimp:

• policy: returns accepted
• time: 30 days
• paid by: seller

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• credit card: mastercard
• other
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seller watercraftimp:

• # reviews: 63393
• city: boise, id
• rating: 99.4%