KAWASAKI 13129-1729 Gear 86-04 24T 5TH

( Manufacturer Part Number: 13129-1729 ), ( Part Type: Gear ), ( Country Of Origin: Japan )

Review KAWASAKI 86-04 24t Output 5th Gear Assembly fits KX80

The **Kawasaki 13129-1729 86-04 24T 5th Gear KX80** is a meticulously crafted, high-performance off-road motorcycle designed for riders seeking a balance of power, precision, and durability on rugged terrain. Built between the model years of 1986 and 1984 (noted as "86-04"), this classic KX80 stands as a testament to Kawasaki s engineering prowess in the early days of motocross, embodying the spirit of the era with its iconic design and reliable performance. The **24-tooth 5th gear sprocket** (part number 13129-1729) is a critical component for optimizing the bike s drivetrain, offering a refined gear ratio that enhances acceleration and handling on tight trails, jumps, and technical sections. This sprocket is designed to complement the bike s 250cc single-cylinder engine, which delivers a potent blend of torque and responsiveness, making it ideal for both competitive motocross and recreational riding. The KX80 s lightweight aluminum frame and chromoly steel components contribute to its agility and durability, allowing it to absorb impacts while maintaining structural integrity during high-speed maneuvers or rough landings. Whether used in its original configuration or as part of a restored classic, this sprocket ensures smooth power delivery, reducing chain wear and maximizing efficiency. Perfect for riders looking to preserve the authenticity of their KX80 or those seeking to upgrade their bike s performance, the **13129-1729 24T 5th gear sprocket** is a premium-quality replacement that aligns with Kawasaki s legacy of innovation and performance.

**Pros and Cons of Buying a Kawasaki KX80 (Model 13129-1729, 1986-2004, 24T, 5th Gear)**

### **Pros**

**Affordability and Availability**

The Kawasaki KX80 from the late 1980s to early 2000s is a budget-friendly dirt bike, especially in the used market. Its age and lack of modern features make it inexpensive compared to newer models. Parts and labor are also relatively cheap, as it is a well-documented and widely available bike.

**Lightweight and Beginner-Friendly**

Weighing around 110-120 lbs (dry), the KX80 is one of the lightest 80cc bikes, making it easy to maneuver for beginners, kids, or smaller riders. Its small size and low power (around 5-7 horsepower) reduce the risk of accidents for inexperienced riders.

**Simple and Reliable Engine**

The 80cc single-cylinder engine is straightforward, with minimal components compared to modern bikes. This simplicity means fewer things can go wrong, and repairs are often easier to diagnose and fix. The 24-tooth sprocket (5th gear) indicates it was likely intended for off-road use rather than track racing, which may appeal to those prioritizing durability over speed.

**Classic Design and Nostalgia**

For enthusiasts who appreciate vintage bikes, the KX80 has a timeless design that stands out. Its retro styling and mechanical simplicity can be appealing to collectors or riders who enjoy the "old-school" feel of dirt bikes.

**Good for Small Riders or Lightweight Use**

The bike s small size makes it suitable for younger riders or adults who prefer a lightweight machine. It s also practical for trail riding, farm work, or casual off-roading where power isn t a priority.

**Easy to Modify**

The KX80 s basic design allows for easy modifications, such as upgrading the carburetor, exhaust, or suspension to improve performance or comfort. Many aftermarket parts are available, and the bike s simplicity makes DIY projects accessible.

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### **Cons**

**Outdated Technology and Performance**

The KX80 lacks modern features like electronic fuel injection (EFI), disc brakes (early models had drum brakes), and advanced suspension systems. Its carbureted engine is less efficient and requires more maintenance than fuel-injected bikes. The power delivery is inconsistent, especially in cold weather, and the bike struggles with steep climbs or rough terrain compared to newer models.

**Poor Braking System**

Early KX80 models (pre-1990s) had drum brakes, which are less effective than modern disc brakes. Even later models with front disc brakes may feel weak, especially when loaded or at higher speeds. This can be dangerous on technical trails or when carrying a passenger.

**Weak Suspension**

The suspension on the KX80 is basic and not designed to handle heavy riders or aggressive riding. The fork and shock are often stiff and lack adjustability, leading to an uncomfortable ride on rough terrain. Upgrading suspension is possible but adds cost.

**Limited Power and Speed**

The 80cc engine is underpowered for serious off-roading or racing. It struggles with steep hills, heavy loads, or sustained high-speed riding. The 5th gear sprocket setup suggests it was not intended for aggressive racing, which may limit its use for competitive riders.

**Reliability Issues Over Time**

While the engine is simple, older KX80s may suffer from wear in the clutch, chain, or transmission over time. The carburetor can clog, and the fuel system may require frequent cleaning. Rust can also be an issue if the bike was stored improperly, especially in wet climates.

**Safety Concerns**

The bike s lightweight and lack of modern safety features (e.g., no ABS, minimal crash protection) make it less safe for aggressive riding. The small size can also lead to instability at higher speeds or on uneven terrain.

**Environmental and Legal Restrictions**

In some areas, 80cc bikes may be restricted from trails or public lands due to noise or environmental regulations. Additionally, modern emissions standards may not apply, but some regions have rules against older, polluting engines.

**Limited Resale Value**

Unlike newer or high-demand bikes, the KX80 has little resale value. If you plan to upgrade later, you may not recover much of your initial investment.

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### **Conclusion and Recommendation**

The Kawasaki KX80 (1986-2004, 24T, 5th gear) is a **great choice for beginners, small riders, or casual off-road enthusiasts** who prioritize affordability, simplicity, and lightweight handling. Its low cost, easy maintenance, and nostalgic appeal make it ideal for learning to ride, light trail use, or as a backup bike. If you re riding on smooth trails, in a controlled environment, or primarily for fun rather than performance, this bike can be a solid investment.

However, if you plan to **ride aggressively, on technical terrain, or at higher speeds**, the KX80 s outdated components, weak braking, and lack of power will quickly become limitations. In this case, a more modern 80cc or 125cc bike (e.g., a Yamaha WR80, Honda CRF80, or a used 125cc with a lower gearing setup) would be a better long-term choice.

- **Buy it if:** You re a beginner, a small rider, or looking for a cheap, easy-to-maintain bike for light off-roading, farm work, or nostalgia.

- **Avoid it if:** You need reliable performance, modern safety features, or plan to ride on challenging terrain regularly.

- **Consider alternatives:** If you want something slightly more capable, look for a **used 80cc with disc brakes (e.g., Yamaha WR80, Honda CR80) or a 125cc bike with a lower gear ratio** for better climbing ability.

For most buyers, the KX80 is a **fun, low-risk bike** just don t expect it to handle like a modern dirt bike. With proper care, it can provide years of enjoyable riding at a fraction of the cost.

Details:

Teeth are in good shape. Look at the pictures to see how clean this part is. P/N - 13129-1729. SOME PARTS MAY or NOT WORK ON OTHER YEARS AND model's.

SOME PARTS FROM THIS ATV WILL PROBABLY WORK ON MANY BIKE's. Check with bike bandit or your dealer. Gear is in good condition. No damage I can see.

Bike lost Thad low compression. Be sure of fitment before buying!!!, Don't waste your money on cheap aftermarket replacements when you can buy this low mileage OEM part for the same. OEM Kawasaki 24T Output 5th Gear. This was removed from a 1990 KX80.

part #: 131291729 prices

• $59.49-$89.88

specifications transmissioncycleoi:

• for models: Kx80
• for makes: Kawasaki
• mpn: 13129-1729
• part type: Gear
• country of origin: Japan

returns transmissioncycleoi:

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

offer transmissioncycleoi:

• quantity: 1
• best offers: True
• started: June 6, 2026
• availability: In Stock
• sold: 0
• options: Ship-to-home

seller transmissioncycleoi:

• city: Canaan, New Hampshire
• # reviews: 10079
• rating: 100.0%

general transmissioncycleoi:

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

shipping transmissioncycleoi:

• cost: $8.95
• transit: 4-9 Days
• class: Economy
• type: Fixed
• service: Economy

payments transmissioncycleoi:

• other
• wallet: Google-pay
• credit card: Discover

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