Z1OPGZSWSP WSM Overbore Piston Kit Msx Polaris

Review WSM Overbore Piston Kit .75mm Over 70.5mm Polaris 150 for POLARIS MSX 2004

The WSM Z1OPGZSWSP Overbore Piston Kit, designed for the Polaris MSX 150 04, is an excellent upgrade solution for those seeking improved engine performance. This piston kit comes with four new overbore pistons, specifically sized at 75mm bore and 70.5mm stroke, ensuring optimal combustion efficiency and power output.

Each piston is meticulously crafted from high-quality forged aluminum alloy, ensuring superior strength and durability. The overbore design increases the engine's displacement, allowing for more fuel and air to be burned in each combustion cycle. Consequently, this results in increased horsepower and torque, enhancing the overall riding experience.

Moreover, these pistons feature a state-of-the-art, nitrided wrist pin and ring grooves. The nitriding process strengthens the piston pins, reducing the likelihood of wear and failure. Additionally, the ring grooves are designed to accommodate high-performance rings, enabling better sealing and combustion efficiency.

The WSM Z1OPGZSWSP Overbore Piston Kit also includes new piston rings, which are essential for proper engine function. These rings maintain the compression seal between the piston and cylinder wall, ensuring efficient fuel combustion and optimal engine performance.

Installing this piston kit is a straightforward process, as it includes all the necessary hardware for a seamless installation. The kit also includes detailed installation instructions to make the process as hassle-free as possible.

In summary, the WSM Z1OPGZSWSP Overbore Piston Kit is an excellent investment for those seeking increased power and improved engine performance from their Polaris MSX 150 04. With its high-quality forged aluminum pistons, advanced designs, and easy installation, this kit is a must-have for any serious ATV enthusiast.

Overbore piston kit, like the WSM Z1OPGZSWSP for the Polaris MSX 150 04, is an aftermarket modification designed to increase engine performance by increasing the piston bore size. This modification can lead to benefits such as:

1. Increased power: Larger pistons allow more fuel and air to be burned in the combustion chamber, resulting in more power output.

2. Improved torque: The increased power output can lead to improved torque, making the ATV more responsive and better suited for towing or carrying heavy loads.

3. Enhanced throttle response: The larger pistons can help improve throttle response, making the ATV feel more lively and responsive.

1. Increased heat: The increased power output can lead to more heat being generated in the engine. This can be mitigated with proper cooling system maintenance and upgrades.

2. Potential engine damage: Overboring the engine can potentially lead to engine damage if not done properly. This includes the risk of piston-to-bore contact, which can cause damage to the piston and cylinder wall.

3. Increased fuel consumption: The increased power output can lead to increased fuel consumption, which can be a drawback for those looking to save on fuel costs.

4. Higher cost: Overbore piston kits can be quite expensive, especially when compared to other performance upgrades.

In conclusion, the decision to buy an overbore piston kit like the WSM Z1OPGZSWSP for a Polaris MSX 150 04 comes down to personal preference and priorities. Those looking for increased power and improved performance may find the benefits worth the investment, despite the potential downsides. However, those looking to save on fuel costs or who are concerned about engine damage may want to consider other performance upgrades instead. Ultimately, it's important to ensure that the installation is done by a qualified mechanic to minimize the risks associated with overboring the engine.

Recommendation: If you're considering an overbore piston kit for your Polaris MSX 150 04, make sure to do your research and choose a reputable brand like WSM. Additionally, have the installation done by a qualified mechanic to minimize the risks associated with the modification. If you're unsure about the benefits and drawbacks of an overbore piston kit, consider consulting with an ATV performance specialist to help you make an informed decision.

Details:

Complete piston kit. This kit will only fit cylinders that are overbore to the bore size listed, standard pistons available in another listing. Piston over bore amount: 0.75mm. Piston diameter: 70.5mm.

Oem piston bore size: 69.75mm. Order one kit per cylinder. Rings available separately. Any fitment provided is for us spec model's.

Item must be in original undamaged unopened packaging. Wrist pin bearing included: yes. 2004 Polaris Msx 150. Stock cylinders will need to be re-bored and re-plated the appropriate size.

Use our shipping packaging to ship back the item, do not tape label directly original manufacturers box.

specifications watercraftimp:

• for models: Msx
• for makes: Polaris
• for years: 2004
• brand: Wsm
• mpn: Z1opgzswsp
• part type: Piston
• california prop 65 warning: Warning, And Birth Defects Or Other Reproductive Harm.
• compatible model: Msx 150
• length: 4.200
• oem piston bore size: 69.75 Mm
• package quantity: Each
• piston diameter: 70.5 Mm
• piston over bore amount: 0.75 Mm
• wrist pin bearing included: Yes

payments watercraftimp:

• other
• wallet: paypal
• credit card: mastercard

offer watercraftimp:

• prices: $84.95–$86.01
• item condition: New
• availability: in stock
• started: july 9, 2025
• options: ship-to-home
• sold #: 20
• in stock #: 5

shipping watercraftimp:

• service: standard
• class: standard
• type: fixed
• transit: 2-6 days

general watercraftimp:

• category: Watercraft Parts > Engines > Impellers Components

returns watercraftimp:

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

seller watercraftimp:

• rating: 98.6%
• city: parkersburg, west virginia
• # reviews: 2010 3