KAWASAKI 13234-0591 Balance Shaft

( Manufacturer Part Number: 13234-0591 ), ( Compatible Model: Ninja 300, Z300 ), ( Compatible Year: 2013, 2014, 2015, 2016, 2017 ), ( Compatible Bikes: 2013-2017 Kawasaki Ninja 300, 2013-2017 Kawasaki Z300 ), ( Type: Balance Shaft Assembly ), ( Color: Silver/gray ), ( Material: Steel/aluminum Alloy )

Review KAWASAKI Balance Shaft Assembly Oem fits NINJA EX300 300 2013–2017

The **Kawasaki Ninja 300 EX300 (Part Number: 13234-0591, Balance Shaft, 2013 2017 Models)** is a meticulously engineered, high-performance accessory designed to elevate the riding experience of the iconic Ninja 300 by addressing one of the most common complaints among sportbike enthusiasts: vibration. This balance shaft assembly is a precision-crafted component that neutralizes the inherent torque-induced vibrations generated by the 296cc parallel-twin engine, delivering a noticeably smoother, more refined ride especially at higher RPMs and during sustained cruising. Crafted from high-grade materials and built to Kawasaki s exacting standards, the balance shaft system features a robust, sealed housing that houses two counter-rotating shafts, each driven by a dedicated gear train. These shafts operate in perfect synchronization with the engine s crankshaft, effectively canceling out the torsional forces that would otherwise cause noticeable shake, particularly in the handlebars, seat, and footpegs. Ideal for riders who demand both performance and comfort, this balance shaft is a straightforward yet transformative upgrade that preserves the Ninja 300 s sporty character while eliminating the fatigue-inducing vibrations that can detract from long rides or aggressive cornering. Installation is designed to be straightforward, requiring minimal disassembly of the engine bay, and Kawasaki s compatibility ensures a seamless fit with the 2013 through 2017 model years of the EX300 variant. Whether you re a weekend warrior seeking a more relaxed ride or a track-focused enthusiast looking to maintain precision under high-speed conditions, this balance shaft is a no-nonsense solution that underscores Kawasaki s commitment to balancing raw performance with rider-centric refinement.

### **Pros and Cons of Buying a Kawasaki Ninja 300 EX300 (2013 2017, Balance Shaft Model, VIN: 13234-0591)**

#### **Pros**

1. **Affordable Entry into Sportbikes**

The Ninja 300 EX300 is a budget-friendly way to experience sportbike handling, performance, and technology without the high cost of a full-fledged 600cc or larger bike. It s ideal for beginners or riders looking for a lightweight, manageable machine.

2. **Lightweight and Maneuverable**

Weighing around **220 230 lbs (dry)**, the EX300 is one of the lightest production sportbikes, making it highly agile in tight spaces, urban traffic, and on twisty roads. Its small size also makes it easier to park and transport.

3. **Balance Shaft Engine (Reduced Vibration)**

The balance shaft in the 296cc parallel-twin engine significantly reduces vibration compared to a standard twin, making for a smoother ride especially at higher RPMs. This is a notable upgrade over non-balance shaft 300cc bikes.

4. **Decent Performance for Its Class**

The engine produces **around 32 34 hp and 20 22 lb-ft of torque**, which is sufficient for highway speeds (up to 110 mph) and spirited riding. While not as powerful as a 600cc bike, it s more than capable for daily commuting, track days, or light track use.

5. **Lightweight Chassis and Handling**

The frame is designed for sportbike dynamics, with a **telescopic front fork and monoshock rear suspension**, providing sharp, responsive handling. The short wheelbase and low seat height (27.8 inches) enhance agility.

6. **Reliability and Durability**

Kawasaki s 300cc parallel-twin engines are known for being **durable and low-maintenance**, especially with proper upkeep. Many of these bikes have lasted well beyond 100,000 miles with basic maintenance.

7. **Easy to Modify and Upgrade**

The EX300 has a **large aftermarket support**, including performance upgrades (exhaust, ECU tuning, suspension), making it easy to enhance power, handling, or aesthetics without breaking the bank.

8. **Fuel Efficiency**

With a **small displacement and efficient engine**, the Ninja 300 gets **around 100 120 mpg**, making it cost-effective for daily riding.

9. **Good for Beginners and Experienced Riders**

The bike s manageable power and lightweight nature make it suitable for new riders learning balance and control. Meanwhile, experienced riders appreciate its nimble handling and track potential.

10. **Classic Sportbike Aesthetics**

The EX300 has a **sleek, aggressive look** reminiscent of larger sportbikes, with a low seat, exposed engine, and sporty ergonomics. It s a fun bike to ride and own.

---

#### **Cons**

1. **Limited Power for Serious Track Use**

While the EX300 is fun on twisty roads, its **32 34 hp** is insufficient for aggressive track days or racing against larger bikes. Riders looking for high-performance track use may find it underpowered.

2. **Poor High-Speed Stability**

The lightweight frame and small wheels make the bike **more prone to wind buffeting and instability at high speeds** (above 90 mph). Larger sportbikes handle better in a straight line.

3. **Basic Braking System**

The **single-disc front brake (240mm)** and rear drum brake (or single disc on some models) are adequate but not as strong as modern 600cc bikes. Upgrading to better brakes (e.g., aftermarket rotors and pads) is recommended for safety.

4. **Comfort Limitations**

The **hard, sporty seat** and upright riding position are not ideal for long-distance touring. Riders with back or neck issues may find it uncomfortable on extended rides.

5. **Narrow Tires and Poor Grip**

The **small 110/70-17 front and 140/60-17 rear tires** provide less grip than larger sportbike tires, affecting cornering performance and wet-weather handling.

6. **Outdated Technology**

Compared to modern bikes, the EX300 lacks **advanced electronics** (traction control, ABS, slipper clutches). While this makes it simpler to maintain, it also means less safety and convenience.

7. **Fuel Capacity and Range**

With a **3.3-gallon tank**, the bike has a **limited range ( 100 120 miles per fill-up)**, which may be inconvenient for long trips without frequent stops.

8. **Resale Value**

The Ninja 300 EX300 holds its value reasonably well, but it s not a high-demand bike like a CB300R or GSX-R300. If you plan to sell later, resale may not be as lucrative as a more popular model.

9. **Maintenance Costs**

While the engine is reliable, **smaller displacement bikes often have more expensive per-hour maintenance costs** due to specialized parts (e.g., balance shaft seals, clutch components).

10. **Not Ideal for Tall Riders**

The **27.8-inch seat height** and upright riding position may be too low or cramped for riders over **5 10 or 6 **. Adjustable seats or aftermarket seats can help, but comfort varies by rider.

---

### **Conclusion**

The **Kawasaki Ninja 300 EX300 (2013 2017, balance shaft)** is an **excellent choice** for riders who want a **lightweight, fun, and affordable sportbike** without the complexity or cost of a larger machine. Its **smooth balance shaft engine, nimble handling, and manageable power** make it perfect for **urban commuting, track days, and learning advanced riding techniques**.

However, it s **not ideal** for riders seeking **high-speed stability, long-distance comfort, or serious track performance**. If you prioritize **agility, fun factor, and low cost of ownership**, this bike is a great pick. If you need **more power, better brakes, or touring comfort**, you may want to consider a **CB300R, GSX-R300, or a used 600cc sportbike**.

---

### **Recommendation**

You re a **beginner or intermediate rider** looking for a **lightweight, fun sportbike**.

You want a **budget-friendly** way to experience **sportbike dynamics** without overspending.

You prioritize **agility, handling, and low maintenance** over raw power.

You plan to **modify it** (exhaust, suspension, ECU) for better performance.

You ride mostly in **urban or twisty roads** rather than highways.

You need **high-speed stability** or **long-distance comfort**.

You re a **tall rider** (over 5 10 6 ) who needs a more upright position.

You plan to **race or track daily** a 600cc bike would be more suitable.

You want **modern safety features** (ABS, traction control).

For the right rider, the **Ninja 300 EX300 is a fantastic bike** fun, reliable, and great for learning. If you find one in **good condition with a clean service history**, it s a **smart purchase** for those who appreciate its strengths. Just be prepared for its **limitations in power and comfort** compared to larger bikes.

Details:

Condition Observations: Good overall condition consistent with low mileage. Fitment - Compatible model's: 2013 Kawasaki Ninja 300 EX300. This is a genuine OEM balance shaft assembly removed from 2016 Kawasaki Ninja 300 EX300 with only 8,493 miles. This is a critical engine component that reduces vibration and ensures smooth operation.

Whats Included: Balance shaft assembly as shown in photos. All lobes and counterweights intact. Clean with minimal oil residue. Gear teeth are in excellent condition with no chipping or excessive wear.

Bearings or bushings not included. Bearing journals are clean and smooth. Whats NOT Included: Mounting hardware not included. Shaft surfaces show normal operational wear but no scoring or damage.

2014 Kawasaki Ninja 300 EX300. 2015 Kawasaki Ninja 300 EX300. Includes drive gear.

part #: 132340591 prices

• $40.00-$200.00

specifications cyclevintagee:

• for models: Ex300, 300, Ninja
• for makes: Kawasaki
• for years: 2013-2017
• mpn: 13234-0591
• compatible model: Ninja 300, Z300
• compatible year: 2013, 2014, 2015, 2016, 2017
• compatible bikes: 2013-2017 Kawasaki Ninja 300, 2013-2017 Kawasaki Z300
• type: Balance Shaft Assembly
• color: Silver/gray
• material: Steel/aluminum Alloy

seller cyclevintagee:

• # reviews: 43
• city: Oviedo, Florida
• rating: 100.0%

general cyclevintagee:

• Parts Accessories > Motorcycle Scooter Parts Accessories > Other Motorcycle Scooter Parts Accessories
• condition: Used

shipping cyclevintagee:

• class: Expedited
• carrier: USPS
• type: Fixed
• cost: $0.00
• service: USPS Priority Mail
• transit: 4-8 Days

offer cyclevintagee:

• options: Ship-to-home
• started: June 12, 2026
• availability: In Stock
• sold: 0
• quantity: 1

returns cyclevintagee:

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

payments cyclevintagee:

• credit card: Diners-club
• other
• wallet: Paypal

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