KAWASAKI 12004-0026 Intake Exhaust Valve Set Springs

( Manufacturer Part Number: 12004-0026 ), ( Type: Exhaust Valve )

Review KAWASAKI Intake And Exhaust Valve Set Springs Hardware fits KFX450R 2008–2014

The **Kawasaki 12004-0026 Intake/Exhaust Valve Set with Springs** is a meticulously engineered aftermarket upgrade kit designed specifically for the **2008 2014 Kawasaki KFX450R**, a rugged and high-performance off-road motorcycle known for its aggressive styling and formidable performance. This premium valve and spring set is crafted to enhance the engine s breathing capacity, improve throttle response, and restore optimal valve clearance, ensuring smoother operation and increased reliability over time. The kit includes a **high-quality intake valve**, **exhaust valve**, and **spring assemblies**, all precision-machined to match or exceed OEM specifications, guaranteeing a seamless fit and optimal performance. Whether you're a competitive off-road racer looking to squeeze out every bit of power or a weekend warrior seeking to maintain peak engine health, this valve set provides the durability and performance gains necessary to keep your KFX450R running at its best. The upgraded components are designed to reduce valve float at high RPMs, minimize wear on the valve train, and enhance overall engine efficiency, making it an essential upgrade for those who demand more from their motorcycle. Built to withstand the demands of aggressive riding and harsh off-road conditions, this kit ensures that your KFX450R maintains its reputation for power and precision, delivering a noticeable improvement in both performance and longevity.

**Pros and Cons of Buying a Kawasaki KFX450R Intake/Exhaust Valve Set with Springs (2008-2014, Part #12004-0026)**

1. **Direct OEM Fitment** This is an official Kawasaki part, ensuring a perfect fit with no modifications required. It eliminates the risk of compatibility issues that can arise with aftermarket alternatives.

2. **Reliability and Durability** Kawasaki parts are engineered to meet the manufacturer s standards, which means they should perform consistently over time without premature wear or failure.

3. **Warranty Coverage** Purchasing from an authorized dealer or Kawasaki-approved seller may include warranty protection, providing peace of mind in case of defects.

4. **Performance Consistency** Since it s a stock component, replacing it with the original part ensures the engine runs as intended by the manufacturer, maintaining proper valve timing, compression, and overall efficiency.

5. **Ease of Installation** Being an OEM part, it should align seamlessly with the existing engine setup, reducing the complexity of the replacement process compared to aftermarket parts that may require additional adjustments.

6. **Prevents Long-Term Damage** Ignoring worn or damaged valve springs, intake, or exhaust valves can lead to catastrophic engine failure. Replacing them proactively avoids costly repairs down the line.

1. **Cost** OEM parts are typically more expensive than aftermarket alternatives. While this may be justified by quality, it can be a significant upfront investment, especially if multiple components need replacement.

2. **Limited Performance Gains** Unlike aftermarket upgrades (e.g., high-flow valves, stiffer springs, or performance exhausts), this part set does not enhance power or throttle response. It primarily restores factory specifications.

3. **Availability and Lead Times** Depending on the seller, OEM parts may not always be in stock, leading to delays in repairs. Aftermarket options often have quicker availability.

4. **No Customization** If the goal is to modify the bike for better performance (e.g., increased valve lift or flow), this part set won t provide those benefits. Aftermarket kits offer tunability.

5. **Potential for Overkill** If the bike is used infrequently or for light-duty tasks, replacing these components may be unnecessary unless there are clear signs of wear (e.g., valve float, excessive valve spring sag, or misfires).

Buying the Kawasaki KFX450R intake/exhaust valve set with springs (part #12004-0026) is the **most reliable and safest choice** for restoring the engine to its original condition, especially if the bike exhibits symptoms like rough idling, misfires, or valve-related noises. It s ideal for owners who prioritize **durability, warranty protection, and OEM compatibility** over performance upgrades. However, if budget is a concern or the bike is being modified for performance, aftermarket alternatives may offer cost savings or additional benefits.

- The bike shows clear signs of valve spring or valve seat wear (e.g., valve float, excessive valve lash, or compression loss).

- You want to avoid risks associated with non-genuine parts.

- You plan to keep the bike stock or restore it to factory condition.

- You have access to warranty support through an authorized dealer.

- You re on a tight budget and can find a high-quality aftermarket kit (e.g., from reputable brands like **JE, Valve Springs Inc., or Ohlsson**) that fits within your price range.

- You re looking to tweak performance (e.g., stiffer springs for better valve control at high RPMs).

- You need parts quickly and aftermarket options are more readily available.

For most owners restoring or maintaining their KFX450R, the **OEM part is the best long-term investment** to ensure reliability and prevent engine damage. However, weigh the cost against your specific needs before purchasing.

Details:

This intake and exhaust valve set with hardware came off of a 2008 Kawasaki KFX450R. Everything pictured is included and in good used condition. This includes the valves, springs, tappets buckets, retainers, spring seats, and collect's. 2008 2014 Kawasaki Kfx450r Intake And Exhaust Valve Set W/ Springs Hardware, This intake and exhaust valve set is in very good condition shows little wear.

Please review all pictures to assess the condition of item. Cody's Garage. The valves show very little wear.

part #: 120040026 prices

• $75.50-$333.41

specifications valvemotorcycleaz:

• for models: Kfx450r
• for makes: Kawasaki
• for years: 2008-2014
• mpn: 12004-0026
• type: Exhaust Valve

offer valvemotorcycleaz:

• availability: In Stock
• started: February 22, 2026
• quantity: 1
• options: Ship-to-home
• sold: 0

payments valvemotorcycleaz:

• other
• credit card: Visa
• wallet: Paypal

shipping valvemotorcycleaz:

• cost: $4.99
• class: Standard
• service: Standard
• transit: 4-9 Days
• type: Fixed

general valvemotorcycleaz:

• Engines Engine Parts > Valvetrain Components > Engine Valves
• condition: Used

returns valvemotorcycleaz:

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

seller valvemotorcycleaz:

• rating: 99.8%
• # reviews: 993
• city: Winchester, Virginia

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