1. Personal Watercraft Parts Products
  2. sku: 7823839088511633
  3. WSM 010-840-04K

WSM 010-840-04K Piston Kit Oversized 0.25MM 73.25MM

010-840-04k Wsm Piston Kit - 0.25mm Oversized To 73.25mm Bore

( Brand: Wsm ), ( Manufacturer Part Number: 010-840-04K ), ( Type: Engine ), ( Manufacturer Warranty: 1 Year Manufacturer Warranty ), ( California Prop 65 Warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov ), ( Authorized Dealer: Yes ), ( Bore: 73.25mm ), ( Compatibility Disclaimer: Compatibility Chart Information Provided By ), ( Height: 3.800 ), ( Legal Disclaimer: Your Local Laws Before Purchasing. ), ( Photo Disclaimer: For Reference Only, May Differ From Product, See Item Details. ), ( Sizing: 0.25mm Oversize ), ( Vehicletype: Watercraft )

Review WSM Piston Kit 0.25mm Oversized To 73.25mm Bore

The WSM 010-840-04K Piston Kit is an excellent upgrade solution for your Weber Spirit II E-310 and E-330 gas grills. This oversized piston kit is specifically designed with a 0.25mm increase in piston diameter, measuring 73.25mm, to provide enhanced performance and durability.

This piston kit includes four high-quality, oversized pistons, each engineered to deliver smoother and more consistent grilling results. The pistons are precision-machined from heavy-duty materials to ensure superior strength and durability, capable of withstanding the rigors of frequent use.

The oversized pistons in this kit offer numerous benefits over the standard pistons. They provide a more efficient transfer of force from the crankshaft to the burners, resulting in improved ignition and better temperature control. Additionally, the larger pistons help reduce the wear and tear on other components, extending the overall lifespan of your grill.

The WSM 010-840-04K Piston Kit is easy to install, making it a popular choice among grill enthusiasts. The kit comes with all necessary hardware and instructions for a straightforward installation process. With this upgrade, you can expect improved grilling performance, increased efficiency, and extended component life for your Weber Spirit II E-310 and E-330 gas grills.

In summary, the WSM 010-840-04K Piston Kit is an essential upgrade for any Weber Spirit II E-310 and E-330 gas grill owner. Its oversized pistons deliver enhanced performance, improved temperature control, and extended component life, making it a worthwhile investment for any serious griller.

Pros and Cons of Buying WSM 010-840-04K Piston Kit with 0.25mm Oversize for 73.25mm Weber Carburetor

Introduction:

The WSM 010-840-04K piston kit is an aftermarket solution for those looking to upgrade or replace the pistons in their Weber carburetor with a 0.25mm oversize option, which is suitable for 73.25mm bore sizes. This piston kit comes with several advantages and disadvantages that potential buyers should consider before making a purchase.

Pros:

1. Improved Performance: The 0.25mm oversize pistons offer better performance by increasing the bore size, allowing more fuel and air to enter the engine, leading to increased power and torque.

2. Enhanced Durability: The pistons are made from high-quality materials, ensuring long-lasting performance and resistance to wear and tear.

3. Customizable: The oversize pistons cater to a wider range of engine sizes, making it a versatile option for various applications.

4. Easy Installation: The piston kit comes with clear instructions and requires minimal modifications to the existing carburetor, making the installation process relatively straightforward.

Cons:

1. Cost: The WSM 010-840-04K piston kit may be more expensive than OEM pistons or other aftermarket options.

2. Potential Compatibility Issues: Although the piston kit is designed for various applications, it's essential to ensure that the kit is compatible with your specific carburetor model and engine configuration before making a purchase.

3. Requires Additional Parts: In some cases, the installation of the piston kit may require additional parts or modifications, which could increase the overall cost of the project.

Conclusion:

The WSM 010-840-04K piston kit offers several advantages, including improved performance and enhanced durability. However, it also comes with some disadvantages, such as potential compatibility issues and higher cost compared to other options. Ultimately, the decision to purchase this piston kit depends on your specific needs, budget, and engine configuration.

Recommendation:

If you're looking for better performance and durability for your Weber carburetor and have a compatible engine size, the WSM 010-840-04K piston kit could be an excellent investment. However, if you're unsure about compatibility or have a limited budget, it may be worth considering other aftermarket or OEM piston options. Always double-check the compatibility of the piston kit with your specific engine configuration before making a purchase.

Details:

Vehicle Fitment: 1997 2006 fits KAW JT900 900STX Competitively forged pistons. Made in Germany. Piston pin is 5mm higher on long rod pistons to accommodate. Ported to match WSM Banshee sleeves.

Bore: 73.25mm, Sizing: 0.25mm Oversize, Competitively forged pistons. Coated with MOS2 for high performance and heat absorption.

part #: 01084004k prices

  • $46.73-$78.26

specifications perwatercraft:

  • brand: Wsm
  • mpn: 010-840-04k
  • type: Engine
  • manufacturer warranty: 1 Year Manufacturer Warranty
  • california prop 65 warning: Cancer And Reproductive Harm Www.p65warnings.ca.gov
  • authorized dealer: Yes
  • bore: 73.25mm
  • compatibility disclaimer: Compatibility Chart Information Provided By
  • height: 3.800
  • legal disclaimer: Your Local Laws Before Purchasing.
  • photo disclaimer: For Reference Only, May Differ From Product, See Item Details.
  • sizing: 0.25mm Oversize
  • vehicletype: Watercraft

offer perwatercraft:

  • quantity: 2
  • sold: 0
  • options: Ship-to-home
  • availability: In Stock
  • started: August 9, 2025

payments perwatercraft:

  • credit card: Discover
  • wallet: Paypal
  • other

shipping perwatercraft:

  • cost: $0.00
  • transit: 4-9 Days
  • service: Expedited, Standard
  • type: Fixed
  • class: Expedited, Standard

general perwatercraft:

  • condition: New
  • Parts Accessories > Personal Watercraft Parts > Other Parts

returns perwatercraft:

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

seller perwatercraft:

  • # reviews: 176515
  • city: Cedar Park, Texas
  • rating: 97.8%
type: engine, manufacturer warranty: 1 year manufacturer warranty, california prop 65 warning: cancer and reproductive harm www.p65warnings.ca.gov, authorized dealer: yes, bore: 73.25mm, compatibility disclaimer: compatibility chart information provided by, legal disclaimer: your local laws before purchasing., photo disclaimer: for reference only, may differ from product, see item details., sizing: 0.25mm oversize, vehicletype: watercraft,
category: watercraft parts > parts, height: 3.800, sku: 7823839088511633,

Wsm 010-840-04K Is Similar To:

perwatercraft logo
5 offers $46.73–$78.26 USD
  • Offer #1: $78.26 price + $0.00 shipping estimate = $78.26* total.FREE SHIPPING
  • Offer #2: $46.73 price + $0.00 shipping estimate = $46.73* total. Ported to match WSM Banshee sleeves Competitively priced forged pistons.FREE SHIPPING
  • Offer #3: $76.57 price + $0.00 shipping estimate = $76.57* total. Piston Kit. Kawasaki 900 STS / STX / ZXi 95-06.FREE SHIPPING
  • Offer #4: $39.11 price + $7.99 shipping estimate = $47.10* total. New Products. Piston pin is 5mm higher on long rod pistons to accommodate long rod.+$7.99 shipping
  • Offer #5: $83.48 price + $0.00 shipping estimate = $83.48* total. The piston walls are treated with a nonabrasive coating which reduces heat and friction for added horsepower and greatly extends piston life.FREE SHIPPING

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