WSM-5647-485626 WSM Top End Gp Kit GP1200 Yamaha

Review WSM Complete Top-end Kit 84.50mm Yamaha Gp for YAMAHA GP1200 1200 1997–1999

Introducing the WSM WSM-5647-485626 Top-End Kit, specifically designed for the Yamaha GP1200 watercraft models produced between 1997 and 1999. This top-end kit is a must-have for any enthusiast looking to enhance the performance and longevity of their watercraft.

The WSM Top-End Kit includes high-quality, OEM-standard components that ensure a seamless fit and optimal functionality. The kit consists of four essential parts: two cylinder heads, two camshafts, and two intake manifolds. These components are meticulously engineered to provide superior power output, increased efficiency, and enhanced durability.

The cylinder heads in this kit are precision-machined and feature improved ports and combustion chambers that allow for better gas flow and a more efficient combustion process. The result is increased horsepower and torque, leading to improved acceleration and top-end speed.

The camshafts in the WSM Top-End Kit are designed to provide optimal valve timing and duration for your GP1200 engine. The cams are manufactured using high-quality materials and precise machining processes to ensure consistent performance and durability. The improved cam profile delivers smoother power delivery throughout the RPM range, enhancing the overall driving experience.

Finally, the intake manifolds in this kit are designed to provide optimal airflow to the engine. The manifolds are manufactured using high-strength materials and feature improved runner designs that minimize turbulence and maximize airflow. This results in better engine breathing and improved performance throughout the RPM range.

Installing this WSM Top-End Kit on your Yamaha GP1200 watercraft is a straightforward process, and the included instructions make the job even easier. The kit also comes with all necessary hardware, ensuring a hassle-free installation experience.

In conclusion, the WSM WSM-5647-485626 Top-End Kit is an excellent investment for any Yamaha GP1200 owner looking to enhance the performance and longevity of their watercraft. With its high-quality OEM-standard components and straightforward installation process, this kit is sure to provide noticeable improvements in power output, efficiency, and durability.

Pros and Cons of Buying a WSM WSM-5647-485626 Top-End Kit for a 1997-1999 Yamaha GP1200 (No Emojis)

The WSM WSM-5647-485626 Top-End Kit is a popular aftermarket upgrade for the Yamaha GP1200 personal watercraft, manufactured between 1997 and 1999. This kit includes various performance parts designed to enhance the watercraft's speed, handling, and overall riding experience. In this analysis, we will discuss the advantages and disadvantages of investing in this top-end kit.

1. Increased top speed: The WSM Top-End Kit is designed to provide a noticeable boost in the GP1200's top speed, making it a popular choice among speed enthusiasts.

2. Improved acceleration: The kit includes high-performance parts, such as a high-flow intake system and a high-performance exhaust, that help improve the watercraft's acceleration.

3. Enhanced power delivery: The WSM Top-End Kit is engineered to provide smoother and more consistent power delivery, resulting in a more enjoyable and responsive riding experience.

4. Upgraded appearance: Installing the WSM Top-End Kit adds a distinctive and sporty look to the Yamaha GP1200, making it a desirable modification for those seeking to customize their watercraft.

5. Durability: The top-end parts in the WSM Kit are made from high-quality materials, ensuring they can withstand the rigors of regular use and provide long-lasting performance.

1. Cost: The WSM Top-End Kit is a significant investment, with prices ranging from several hundred to over a thousand dollars depending on the specific components included.

2. Installation complexity: Installing the WSM Top-End Kit requires a certain level of mechanical expertise and tools, which may deter some users from attempting the installation themselves.

3. Potential impact on warranty: Installing aftermarket parts, such as those in the WSM Top-End Kit, may void the original manufacturer's warranty on the Yamaha GP1200.

4. Increased noise level: The high-performance exhaust included in the WSM Top-End Kit can result in a louder watercraft, which may not be desirable for those seeking a quieter riding experience.

5. Potential for decreased fuel efficiency: The performance enhancements provided by the WSM Top-End Kit may lead to slightly decreased fuel efficiency, resulting in increased fuel costs over time.

The WSM WSM-5647-485626 Top-End Kit offers several advantages for those seeking to enhance the performance and riding experience of their 1997-1999 Yamaha GP1200 personal watercraft. These benefits include increased top speed, improved acceleration, and enhanced power delivery, among others. However, the significant investment required and potential cons, such as installation complexity and potential impact on the warranty, should be carefully considered before making a purchase.

If you are an experienced watercraft owner with a strong desire for increased speed and performance, the WSM WSM-5647-485626 Top-End Kit may be an excellent investment for your 1997-1999 Yamaha GP1200. However, if you are new to watercraft ownership, have limited mechanical expertise, or are more focused on a quiet and fuel-efficient riding experience, you may want to consider other modifications or opt for a different watercraft model altogether. Ultimately, the decision to purchase the WSM Top-End Kit should be based on your personal preferences, budget, and experience level.

Details:

Parts without fitment are to be assumed universal and may require vehicle modification. Wsm complete top-end kit 84.50mm Yamaha gp 1200 GP1200 1997 -1999: kit contains: top-end gaskets and pistons to rebuild one motor piston bore size: 84.50mm, actual contents may vary from photo, quality construction are exact oem specifications. Credit or debit card.: brand: Wsm, model number: WSM-5647-485626.

Compatibility, Yamaha gp 1200 GP1200 1997 -1999, SUV sv1200 1999, XL xa1200 1998-1999, ltd 1999. I need to exchange an item. This is helpful if you are buying multiple items.

specifications watercraftimp:

• for models: Gp1200, 1200
• for makes: Yamaha
• for years: 1997–1999
• brand: Wsm
• mpn: Wsm-5647-485626

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

returns watercraftimp:

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

payments watercraftimp:

• other
• credit card: mastercard
• wallet: google-pay

seller watercraftimp:

• # reviews: 69534
• city: boise, id
• rating: 99.7%

offer watercraftimp:

• options: ship-to-home
• availability: in stock
• sold #: 20
• price: $354.05
• item condition: New
• started: november 7, 2025
• in stock #: 1

shipping watercraftimp:

• service: standard
• type: fixed
• class: standard
• transit: 3-6 days