COMET MN-4PEK Clutch Spring Engine MN/4PEK

( Brand: Comet ), ( Manufacturer Part Number: MN/4PEK ), ( Color: Silver ), ( Compatible Year: 1981 1980 1979 1978 ), ( Bundle Description: 1 Pc Genuine Comet Clutch Spring ), ( Type: Clutch Spring ), ( Core Charge: Free No Core Charge ), ( Fitment Type: Direct Replacement )

Review COMET Mn/4pek Clutch Spring Yamaha Engine And Components fits EX440 XS 1978–1981

Introducing the Comet MN/4PEK Clutch Spring, a vital component designed specifically for the 1978-1981 Yamaha EX440 and XS engines. This clutch spring is an essential upgrade for those seeking improved performance and reliability.

The Comet MN/4PEK Clutch Spring is meticulously crafted using high-tensile steel, ensuring it can withstand the rigors of off-road riding and racing. It boasts a heavy-duty design, providing enhanced clamping force that results in a stronger engagement between the clutch plates and the engine crankshaft. This translates to smoother power delivery and better control, particularly when maneuvering through technical trails or accelerating rapidly.

The spring's unique 4-ply construction is engineered to minimize flex and provide consistent clutch engagement throughout the entire RPM range. This contributes to a more responsive and predictable riding experience, ensuring that your Yamaha EX440 or XS engine performs at its best, no matter the terrain or riding conditions.

Additionally, the Comet MN/4PEK Clutch Spring comes with a precision-machined, chrome-plated steel end cap that not only adds a touch of style to your engine but also ensures a secure fit and prevents any potential clutch slippage. The spring is also designed to be compatible with stock clutch components, making it an easy and direct upgrade for your Yamaha EX440 or XS engine.

In summary, the Comet MN/4PEK Clutch Spring is an essential upgrade for any Yamaha EX440 or XS engine from 1978 to 1981. Its heavy-duty design, enhanced clamping force, and 4-ply construction result in improved performance, better control, and increased reliability. With its precision-machined end cap and easy installation process, this clutch spring is an investment that will pay off in the long run, ensuring your Yamaha EX440 or XS continues to deliver an unforgettable riding experience.

Comet MN/4PEK Clutch Spring for 1978-1981 Yamaha EX440 and XS Engines: A Detailed Analysis

The Comet MN/4PEK clutch spring is a popular aftermarket option for the 1978-1981 Yamaha EX440 and XS engines. This spring is known for its durability and high clamping force. In this analysis, we will discuss the pros and cons of buying this clutch spring, followed by an Recommendation.

1. Enhanced Durability: The Comet MN/4PEK clutch spring is made of high-quality material that can withstand the rigors of heavy use, ensuring that it lasts longer than the stock clutch spring.

2. Increased Clamping Force: This aftermarket clutch spring provides a higher clamping force compared to the stock spring, which results in a smoother engagement and better power transmission.

3. Improved Performance: With the increased clamping force, the Comet MN/4PEK clutch spring can help improve the overall performance of the engine by reducing power loss during the engagement process.

1. Cost: The Comet MN/4PEK clutch spring may be more expensive than the stock clutch spring, which could be a deterrent for some riders.

2. Installation: Installing the aftermarket clutch spring may require additional tools and expertise, which could add to the overall cost and time investment.

3. Potential Clearance Issues: Some riders have reported clearance issues with the Comet MN/4PEK clutch spring, which could result in interference with other components or a difficult installation.

The Comet MN/4PEK clutch spring for the 1978-1981 Yamaha EX440 and XS engines offers several advantages, including enhanced durability, increased clamping force, and improved performance. However, it also comes with some disadvantages, such as cost, installation complexity, and potential clearance issues. Ultimately, whether or not to invest in this aftermarket clutch spring depends on the rider's priorities, budget, and technical expertise.

If you value improved performance, durability, and are willing to invest time and money in the installation process, the Comet MN/4PEK clutch spring could be an excellent choice for your 1978-1981 Yamaha EX440 or XS engine. However, if you are on a tight budget or have limited technical expertise, the stock clutch spring may be a more suitable option for you. In any case, it is essential to consult the installation instructions carefully and ensure that you have the necessary tools and expertise before attempting the installation.

part # mn4pek price

• $29.10

specifications utvshift:

• for models: Ex440, Xs
• for makes: Yamaha
• for years: 1978-1981
• brand: Comet
• manufacturer part number: MN/4PEK
• color: Silver
• compatible year: 1981 1980 1979 1978
• bundle description: 1 Pc Genuine Comet Clutch Spring
• type: Clutch Spring
• core charge: Free No Core Charge
• fitment type: Direct Replacement

shipping utvshift:

• service: Standard
• class: Standard
• transit: 5-9 Days
• type: Fixed
• cost: $0.00

seller utvshift:

• # reviews: 16508
• rating: 98.7%

returns utvshift:

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

payments utvshift:

• credit card: Mastercard
• wallet: Paypal
• other

offer utvshift:

• sold: 0
• options: Ship-to-home
• started: January 23, 2026
• quantity: 1
• availability: In Stock

general utvshift:

• ATV, Side-by-Side UTV Parts Accessories > Transmission Drivetrain > Other Transmission Drivetrain Parts
• condition: New

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