KAWASAKI 49046-1057 Kips Power Valve Powervalve Governor Rod

( Manufacturer Part Number: 49046-1057 ), ( Type: Power Valve )

Review KAWASAKI Oem Kips Power Valve Powervalve Governor Rod fits KX500 1988

The **Kawasaki 49046-1057 1988 KX500 Power Valve/PowerValve Governor Rod** is a meticulously engineered, high-performance component designed exclusively for Kawasaki s legendary KX500 motocross bike, a machine renowned for its raw power, precision handling, and dominance on the track during the late 1980s. This specific part is a critical element of the bike s advanced **Power Valve system**, a groundbreaking technology introduced by Kawasaki to optimize throttle response, engine efficiency, and rider control particularly in high-revving, high-stress motocross conditions. The **PowerValve Governor Rod** (often referred to as the "Power Valve rod" or "governor rod") plays a pivotal role in regulating the opening and closing of the Power Valve, a secondary intake valve that enhances airflow into the engine at high RPMs, unlocking additional horsepower and torque while maintaining smooth, linear power delivery. Crafted from durable, heat-treated steel, this rod is built to withstand the extreme forces generated by the KX500 s twin-spark, liquid-cooled, four-stroke engine, which could rev aggressively beyond 14,000 RPM in race trim. The design incorporates precision-machined surfaces and a robust mounting interface, ensuring seamless integration with the Power Valve mechanism and the bike s carburetion system. Whether you're restoring a classic KX500 to its original racing glory or upgrading an existing bike for improved performance, this governor rod is an essential replacement part that preserves the integrity of the Power Valve s functionality. Its compatibility with the 1988 model year along with other late-'80s KX500 variants makes it a sought-after component for enthusiasts seeking to maintain or enhance the bike s legendary performance characteristics. Proper installation requires careful attention to alignment and torque specifications, as even slight misalignment can compromise the valve s operation, leading to reduced power or potential engine damage. For riders and mechanics who appreciate the marriage of cutting-edge engineering and raw motocross spirit, this governor rod embodies the innovation that helped define the KX500 as one of the most influential dirt bikes of its era.

### **Pros and Cons of Buying a 1988 Kawasaki KX500 with Power Valve, Powervalve Governor Rod (Part #49046-1057)**

#### **Pros**

1. **Classic Off-Road Performance** The KX500 is a legendary trail bike known for its balance of power, handling, and reliability. It was designed for serious enduro and motocross riding, making it a great choice for riders who appreciate classic dirt bike engineering.

2. **Proven Reliability** Kawasaki s air-cooled, single-cylinder engine in this era was well-built and durable. With proper maintenance, many KX500s from the late '80s still run strong today, especially if they were well-maintained by their previous owners.

3. **Modularity & Upgrade Potential** The KX500 is highly modifiable. The **Power Valve (Powervalve) system** (which adjusts exhaust flow for better throttle response) was an advanced feature for its time, and the **governor rod** (part #49046-1057) helps fine-tune RPM control. This bike can be further upgraded with modern components like aftermarket forks, exhausts, or carburetures if desired.

4. **Strong Secondary Market** The KX500 remains a popular bike in the classic dirt bike community. Finding parts, rebuild kits, and aftermarket support is relatively easy compared to more obscure models.

5. **Lower Cost of Ownership (Compared to Modern Bikes)** Fuel, maintenance, and insurance are typically cheaper than on modern sportcross or trail bikes. The bike s simplicity also means fewer high-cost repairs.

6. **Nostalgia & Collectibility** For enthusiasts who appreciate vintage Japanese dirt bikes, the KX500 holds sentimental value. Some well-preserved examples can appreciate in value over time, especially if they have original components or racing history.

7. **Lightweight & Maneuverable** The KX500 is one of the lighter 500cc trail bikes, making it easier to handle on technical terrain compared to heavier modern bikes.

8. **Good for Learning & Proving Grounds** The bike s power delivery (a strong low-end torque kick) makes it a good choice for riders looking to improve their skills before moving to more advanced machines.

---

#### **Cons**

- **Worn piston rings, valves, or crankshaft** (common in high-mileage air-cooled engines).

- **Exhaust port leaks** (due to age and lack of modern sealing materials).

- **Carburetor drift** (CV carburetures can become unreliable over time).

- **Suspension wear** (shock seals, bushings, and springs may need replacement).

- **Rust** (if stored in wet conditions, the frame or swingarm could be affected).

- **Disc brakes** (it uses a drum brake, which is less effective in wet conditions).

- **Modern fuel injection** (carburetors are less precise and more prone to tuning issues).

- **Electronic rider aids** (no traction control, launch control, or slipper clutches).

- **Lighter, stronger materials** (the frame and swingarm are heavier than modern aluminum designs).

3. **Fuel & Emissions Concerns** While not a major issue for off-road use, the bike runs on **two-stroke fuel (if modified) or four-stroke gasoline**, which can be harder to find in some regions. Some areas may also have restrictions on two-stroke engines due to emissions.

4. **Limited Comfort for Long Rides** The ergonomics are designed for aggressive riding. The seat is firm, the handlebars are narrow, and the suspension is stiff by modern standards, making it less comfortable for long trail rides compared to modern trail bikes.

5. **Parts Availability Can Be Hit-or-Miss** While generally well-supported, some **OEM parts may be discontinued**. Aftermarket options exist, but they can be more expensive than stock replacements.

- **Frame cracks** (common in older dirt bikes due to stress from impacts).

- **Worn-out drive chain** (a major wear item that needs frequent checking).

- **Leaking seals** (crankcase, camshaft, or timing cover gaskets).

- **Rust in the swingarm or rear triangle** (if stored outdoors).

7. **Resale Value Depends on Condition** Unlike a well-maintained classic motorcycle, a neglected KX500 will depreciate quickly. If you plan to sell later, keeping it in **showroom condition** is essential.

8. **Not Ideal for Heavy Trail Use** While capable, the **single-cylinder engine lacks modern power delivery smoothness**, and the **suspension is less adjustable** than modern units. Riders expecting a "plug-and-play" trail bike may find it less forgiving.

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### **Ending Conclusion**

The **1988 Kawasaki KX500 with a Power Valve and governor rod** is a **fantastic choice for enthusiasts who appreciate classic dirt bike engineering, enjoy tinkering, and prioritize raw performance over modern convenience**. It offers **proven reliability, upgrade potential, and a strong following** in the off-road community. However, it is **not a "set-and-forget" bike** it demands **regular maintenance, mechanical familiarity, and patience** to keep running smoothly.

If you re looking for a **project bike** to restore, a **racing or enduro machine** for a rider who enjoys working on their own machine, or a **nostalgic ride** with a cult following, this KX500 is an excellent pick. On the other hand, if you want a **modern, low-maintenance, all-day trail bike** with advanced safety features, a newer model would be a better investment.

---

### **Recommendation**

You have **mechanical experience** and enjoy working on bikes.

You re looking for a **project** to restore or modify.

You **prioritize performance and nostalgia** over modern comforts.

You plan to **ride it regularly** and maintain it properly.

You re okay with **some wear-and-tear** and potential repairs.

You want a **plug-and-ride** bike with minimal maintenance.

You re not comfortable with **carburetors, air-cooled engines, or older suspension**.

You need **modern safety features** (disc brakes, traction control, etc.).

You re buying it **primarily for resale** without intending to restore it.

You expect it to **run like a modern bike** without significant work.

This KX500 is a **great bike for the right rider** one who appreciates classic dirt bike culture and isn t afraid of a little work. **Get it if you re prepared for maintenance, enjoy the challenge, and want a piece of off-road history.** If you re looking for a hassle-free ride, consider a newer trail bike instead.

Details:

All teeth are intact. 1988 KAWASAKI KX500 OEM KIPS POWER VALVE POWERVALVE GOVERNOR ROD 49046-1057, This power valve governor rod is in good condition and shows normal signs of wear. Has a small amount of corrosion as shown. Overall good functional shape.

Removed From: 1988 Kawasaki KX5 Please review all pictures to assess the condition of item. Nice and straight with no cracks.

part #: 490461057 prices

• $119.99-$149.99

specifications valvemotorcycleaz:

• for models: Kx500
• for makes: Kawasaki
• for years: 1988
• mpn: 49046-1057
• type: Power Valve

payments valvemotorcycleaz:

• other
• wallet: Paypal
• credit card: Mastercard

seller valvemotorcycleaz:

• rating: 100.0%
• city: Boylston, Massachusetts
• # reviews: 2563

returns valvemotorcycleaz:

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

offer valvemotorcycleaz:

• sold: 0
• quantity: 1
• availability: In Stock
• started: June 11, 2026
• options: Ship-to-home

shipping valvemotorcycleaz:

• type: Fixed
• service: USPS Priority Mail
• cost: $0.00
• transit: 4-9 Days
• class: Expedited
• carrier: USPS

general valvemotorcycleaz:

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

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