MN-T5D2 WSM Platinum Top End Waverunner Jz Kit GP800 Yamaha

Review WSM Mn/t5d2 Platinum Series Top End Kit For Yamaha Waverunner Jz for YAMAHA GP800 1998–2000

The WSM MN/T5D2 Platinum Top End Kit is a high-performance upgrade for your 1998-2000 Yamaha GP800 Waverunner with the JZ engine. This top end kit is designed to enhance the power output and overall performance of your watercraft.

The WSM MN/T5D2 Platinum Top End Kit includes new cylinder heads, intake manifold, and camshafts. The cylinder heads are CNC machined from billet aluminum and feature large 41mm intake and 32mm exhaust valves. These larger valves increase the flow of air and fuel into the engine, allowing for a more efficient combustion process and increased horsepower.

The intake manifold in this kit is also made from billet aluminum and is designed to provide better flow and distribution of air and fuel to the engine. It features a high-flow design with increased runner length and diameter, which helps to improve engine response and power.

The camshafts in this kit are made from billet steel and feature a high-lift profile. They provide increased lift and duration, which helps to improve engine breathing and power output. The camshafts are also designed to work with the larger valves in the cylinder heads, ensuring optimal performance.

This kit also includes new pistons, rings, and cylinder sleeves. The pistons are made from forged aluminum and feature a high-performance design with a compression ratio of 10.5:1. The rings are made from high-temperature material and feature a multi-layer design for improved sealing and durability. The cylinder sleeves are made from high-strength material and are designed to provide excellent wear resistance and durability.

The WSM MN/T5D2 Platinum Top End Kit also includes new valve springs, retainers, and guides. The valve springs are made from high-tensile material and provide improved valve control and durability. The retainers and guides are made from high-strength material and are designed to provide excellent wear resistance and durability.

This kit is suitable for serious performance enthusiasts who want to maximize the power output and performance of their 1998-2000 Yamaha GP800 Waverunner with the JZ engine. It is easy to install with step-by-step instructions provided, and it comes with a one-year warranty for peace of mind. Upgrading with this top end kit will provide noticeable improvements in horsepower, torque, and overall engine performance.

The WSM MN/T5D2 Platinum top end kit is a popular upgrade option for the 1998-2000 Yamaha GP800 waverunner jet ski model. This kit includes new cylinders, pistons, and other related components to improve engine performance. Here are some pros and cons to consider before making a purchase:

1. Increased horsepower: The Platinum top end kit is designed to provide a significant horsepower boost, making your GP800 faster and more responsive.

2. Improved durability: The new components in the kit are made from high-quality materials that can withstand the rigors of regular use, reducing the likelihood of engine failure.

3. Enhanced reliability: The Platinum top end kit includes upgraded components that are less prone to common issues, such as detonation and pre-ignition.

4. Better fuel efficiency: The improved engine performance can lead to better fuel economy, as your jet ski will require less power to reach the same speeds.

1. Cost: The Platinum top end kit is a significant investment, and the cost may be a deterrent for some buyers.

2. Installation complexity: Installing the kit requires some mechanical knowledge and experience, and the process can be time-consuming.

3. Potential for engine damage: Improper installation or use of low-quality aftermarket parts can result in engine damage, which could be costly to repair.

In conclusion, the WSM MN/T5D2 Platinum top end kit for the 1998-2000 Yamaha GP800 waverunner jet ski offers several benefits, including increased horsepower, improved durability, enhanced reliability, and better fuel efficiency. However, the cost and installation complexity are potential drawbacks. If you have the mechanical skills and budget to install the kit yourself or hire a professional, it can be a worthwhile investment for enhancing the performance and longevity of your jet ski.

If you're considering purchasing the WSM MN/T5D2 Platinum top end kit for your 1998-2000 Yamaha GP800 waverunner, make sure to do your research and choose a reputable supplier. Additionally, consider your mechanical abilities and budget before making the purchase. Installing the kit yourself can save you money, but hiring a professional may be a better option if you're not confident in your abilities. Ultimately, the decision to purchase the kit depends on your personal goals and priorities for your jet ski.

Details:

Wsm platinum series top end kit for 1998 - 2000 Yamaha GP800 waverunner jz: status: in stock.

specifications watercraftimp:

• for makes: Yamaha
• for years: 1998–2000
• brand: Wsm
• mpn: Mn/t5d2
• compatible year: 2000 1999 1998
• compatible model: Gp800 Waverunner Gp800
• bundle description: 1 Pc Genuine Wsm Platinum Series Top End Kit
• type: Platinum Series Top End Kit
• core charge: Free No Core Charge
• fitment type: Direct Replacement

seller watercraftimp:

• city: multiple warehouses
• # reviews: 17522
• rating: 98.7%

payments watercraftimp:

• credit card: visa
• wallet: paypal
• other

returns watercraftimp:

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

shipping watercraftimp:

• transit: 4-6 days
• class: standard
• type: fixed
• service: standard

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

offer watercraftimp:

• started: february 14, 2026
• prices: $263.48–$290.48
• item condition: New
• availability: in stock
• sold #: 9
• options: ship-to-home
• in stock #: 5