13390-W339300-70 WSM Top End Bearing Jet Ski JS650 Kawasaki

Review WSM Top End Bearing For Kawasaki Jet Ski for KAWASAKI JS650 1991–1993

Introducing the WSM 13390-W339300-70 Top End Bearing, an essential replacement part for the 1991-1993 Kawasaki JS650 and JS650SX jet skis. This top end bearing is meticulously engineered to provide optimal performance and reliability for your watercraft.

The WSM Top End Bearing is specifically designed for the 650cc two-stroke engine found in the Kawasaki JS650 and JS650SX jet ski models produced between 1991 and 1993. This high-quality bearing is manufactured using premium materials and advanced manufacturing techniques to ensure a perfect fit and long-lasting durability.

The outer diameter of the bearing measures 33.93 inches (861.2 mm), with an inner diameter of 2.87 inches (72.8 mm) and a width of 1.25 inches (31.75 mm). The bearing also features a thickness of 0.2 inches (5.1 mm) and a hole diameter of 1.37 inches (34.8 mm). These dimensions precisely match the original equipment manufacturer (OEM) specifications to ensure a seamless installation.

This top end bearing is engineered to minimize friction and wear, which is crucial for the smooth operation of your jet ski engine. The high-quality steel construction ensures strength and durability, while the precision machining guarantees a perfect fit and even load distribution.

Installation of the WSM Top End Bearing is straightforward and can be completed with basic tools and some mechanical knowledge. The bearing comes with detailed instructions to ensure a successful installation, and the use of high-quality grease is recommended to ensure the longevity and performance of the bearing.

Investing in a genuine WSM Top End Bearing for your 1991-1993 Kawasaki JS650 or JS650SX jet ski is an investment in the longevity and performance of your watercraft. This high-quality replacement part is designed to provide superior performance, reliability, and durability, ensuring that you can continue to enjoy your jet ski for years to come.

Top End Bearing Upgrade for 1991-1993 Kawasaki JS650/650SX Jet Ski: Pros, Cons, and Recommendation

The WSM 13390-W339300-70 top end bearing is a popular upgrade for the 1991-1993 Kawasaki JS650/650SX jet ski engines. In this analysis, we will discuss the potential advantages and disadvantages of investing in this bearing upgrade.

1. Improved Engine Performance: Upgrading to a high-quality top end bearing like the WSM 13390-W339300-70 can lead to enhanced engine performance. A superior bearing reduces friction and allows for smoother engine operation, which can lead to increased power and better overall performance.

2. Longer Service Life: The WSM top end bearing is designed to be more durable than the original OEM bearing. This means that, once installed, it can last longer than the stock bearing, reducing the frequency of maintenance tasks and potential engine downtime.

3. Reduced Noise: Upgrading to a new top end bearing can help reduce engine noise. The WSM bearing is specifically engineered to minimize vibrations and noise, creating a quieter and more enjoyable riding experience.

4. Enhanced Engine Protection: A high-quality top end bearing can help protect the engine from damage. The WSM bearing is made from stronger materials and has better sealing properties, reducing the likelihood of oil leaks and contamination.

1. Cost: The WSM 13390-W339300-70 top end bearing is more expensive than the original OEM bearing. While the potential benefits may outweigh the cost for some users, others may prefer to save money and stick with the stock bearing.

2. Installation Complexity: Installing the WSM top end bearing can be a more complex process than replacing the stock bearing. It may require specialized tools and skills, potentially incurring additional labor costs.

3. Potential Compatibility Issues: Although the WSM top end bearing is designed to fit the 1991-1993 Kawasaki JS650/650SX engines, there is a possibility of compatibility issues. It is important to ensure that the bearing is the correct fit for your specific engine model and year.

The decision to upgrade to the WSM 13390-W339300-70 top end bearing for your 1991-1993 Kawasaki JS650/650SX jet ski engine ultimately depends on your personal preferences and priorities. If you value improved engine performance, longer service life, reduced noise, and enhanced engine protection, then the benefits of the upgrade may outweigh the costs and installation complexity. However, if you are on a tight budget or prefer to keep your jet ski in its original condition, then it may be best to stick with the original OEM bearing.

If you are considering upgrading to the WSM 13390-W339300-70 top end bearing, we recommend that you first ensure that it is the correct fit for your specific engine model and year. You should also carefully weigh the potential benefits against the costs and installation complexity to determine whether the upgrade is worthwhile for you. If you do decide to proceed with the upgrade, we recommend that you source the part from a reputable supplier and consider hiring a professional to perform the installation to ensure that it is done correctly.

Details:

Brand: Wsm, model number: 13390-W339300-70. Wsm top end bearing for 1991 - 1993 Kawasaki JS650 650SX jet ski: pistons. Compatibility: years: make: model: application: notes: 1991 - 1996 Kawasakijf650 ts, 1993 Kawasakijs650 650SX, 1993 1996 sea-despair, 1992 1996 sea-digits, 1987 1995 Kawasakijf650 x2, 1995 Kawasakijl650 SC, 1992 sea-Dix, 1993 sea-digits, 1996 sea-doors, 1993 sea-discs, 1990 1991 sea-digit. Parts without fitment are to be assumed universal and may require vehicle modification.

This is helpful if you are buying multiple items. I need to exchange an item.

specifications watercraftimp:

• for models: Js650
• for makes: Kawasaki
• for years: 1991–1993
• brand: Wsm
• mpn: 13390-w339300-70
• part type: Bearing Jet

offer watercraftimp:

• sold #: 16
• in stock #: 1
• options: ship-to-home
• started: may 9, 2026
• availability: in stock
• price: $27.55
• item condition: New

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• policy: returns accepted
• time: 30 days

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• # reviews: 84966
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• city: boise, id

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• category: Watercraft Parts > Engines > Impellers Components

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