WSM WPS12-1129 Carburetor Rebuild Kit 006-347

( Brand: Wsm ), ( Manufacturer Part Number: WPS12-1129 ), ( Part Type: Carburetor ), ( Universal: No )

Review WSM 12-1129 Carburetor Rebuild Kit

The **WSM WPS12-1129 (also referenced as 12-1129 or 006-347) Carburetor Rebuild Kit** is a meticulously engineered aftermarket solution designed to restore peak performance and reliability to vintage and classic carburetors, particularly those found in high-performance engines from brands like Weslake, WSM, or other small-block applications. This premium rebuild kit is crafted to meet the exacting standards of enthusiasts and mechanics who demand precision, durability, and optimal fuel-air mixture control. The kit includes a comprehensive selection of high-quality components, ensuring a thorough and professional-grade restoration that minimizes the risk of leaks, clogs, or performance degradation. At its core, the kit features a **newly machined carburetor body**, often constructed from lightweight yet robust materials like aluminum or high-grade steel, depending on the model, to maintain structural integrity while reducing unnecessary weight. The rebuild kit also incorporates a **complete set of gaskets and seals**, including O-rings, needle seals, and diaphragm seals, all engineered to resist heat, fuel, and oil degradation over extended periods of use. These seals are designed to create an airtight, leak-proof interface between critical components, ensuring consistent vacuum and pressure regulation essential for maintaining throttle response and fuel efficiency.

Central to the kit is a **fresh set of carburetor jets and passages**, including the main metering jets, idle mixture screws, and pilot jets, all precision-machined to factory or slightly upgraded specifications to enhance airflow and atomization. The kit may also include **new float bowls and floats**, which are often the culprits behind fuel starvation or inconsistent idle conditions in older carburetors. These components are calibrated to the correct displacement and buoyancy, preventing fuel overflow or starvation under varying engine loads. For applications requiring enhanced performance, the kit might feature **upgraded throttle bodies, accelerator pumps, and choke mechanisms**, allowing for finer adjustments to idle quality, cold-start performance, and high-RPM fuel delivery. The rebuild kit further includes **new carburetor linkages and cables**, ensuring smooth and precise throttle operation without play or binding, which is crucial for maintaining consistent engine response across the RPM range.

To facilitate a seamless installation, the WSM WPS12-1129 rebuild kit is accompanied by **detailed instructions and alignment charts**, guiding mechanics through each step of the disassembly, cleaning, and reassembly process. The kit emphasizes the use of **high-performance lubricants and sealants**, such as silicone-based compounds or specialized carburetor grease, to prevent corrosion and ensure long-term functionality. Additionally, the kit may include **specialty tools or adapters** tailored to the specific carburetor model, simplifying tasks like jet installation, diaphragm replacement, or linkage adjustment. Whether restoring a carburetor for a classic race engine, a high-performance street machine, or a vintage aircraft application, this rebuild kit offers a turnkey solution that combines OEM-level quality with modern enhancements to deliver reliable, high-output performance. By investing in this kit, enthusiasts can extend the lifespan of their carburetor, improve fuel economy, and unlock the full potential of their engine s power delivery.

### Pros and Cons of buying a WSM WPS12-1129 (or 12-1129 006-347) Carburetor Rebuild Kit

1. **Compatibility and Reliability** The WSM WPS12-1129 is a well-known rebuild kit designed specifically for the **Weber 12-1129 carburetor**, a popular choice for classic and performance vehicles (e.g., Ford Mustangs, European sports cars, and muscle cars). WSM (Weber Specialties Manufacturing) is a trusted brand in carburetor restoration, ensuring parts are designed to fit and function correctly.

2. **High-Quality Components** The kit includes gaskets, seals, jets, and other critical parts made from durable materials, reducing the risk of leaks or premature wear. The new gaskets and seals help prevent fuel leaks, which is a common issue with older carburetors.

3. **Performance Restoration** A properly rebuilt carburetor can restore or even improve engine performance by ensuring proper fuel-air mixture, smoother idle, and better throttle response. This is especially valuable for high-performance or show cars where carburetion plays a key role.

4. **Cost-Effective Alternative to Replacement** Rebuilding a carburetor is often cheaper than buying a new one, especially for vintage or high-performance models where OEM replacements may be expensive or hard to find.

5. **Ease of Installation** The kit is designed for straightforward assembly, and WSM provides clear instructions. Many mechanics and DIY enthusiasts find that rebuilding a carburetor is a manageable project with the right tools (e.g., carburetor cleaning solvent, jet puller, and torque wrench).

6. **Prevents Future Issues** A neglected carburetor can develop internal corrosion, clogged jets, or worn seals, leading to poor performance or failure. Rebuilding it now can prevent costly engine damage down the line.

7. **Customization Options** Depending on the kit, you may have the option to upgrade certain components (e.g., larger jets for more power or different needle valves for better idle quality), allowing you to fine-tune the carburetor to your engine s needs.

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1. **Time-Consuming Process** Rebuilding a carburetor requires disassembly, cleaning, inspection, and reassembly, which can take several hours, especially for beginners. If you re not experienced with carburetor work, you may need to invest time in learning the process or hire a professional.

2. **Requires Specialized Tools** While not all tools are expensive, you ll need items like a carburetor cleaning solvent, jet puller, torque wrench, and possibly a carburetor bore gauge. If you don t already own these, the upfront cost can add up.

3. **Potential for Mistakes** Improper reassembly (e.g., overtightening bolts, incorrect jet installation, or misaligned components) can lead to leaks, poor performance, or even damage to the carburetor. This risk is higher for first-time rebuilders.

4. **Depends on Carburetor Condition** If the carburetor itself is severely corroded, cracked, or internally damaged (e.g., warped bore, bent needles), a rebuild kit alone may not be sufficient. In such cases, you might need to replace the carburetor entirely.

5. **Learning Curve for Tuning** After rebuilding, you may need to adjust the carburetor (e.g., idle mixture screws, vacuum advance) to match your engine s requirements. This can be trial-and-error without proper tuning knowledge.

6. **Environmental Considerations** Carburetor cleaning involves solvents that can be hazardous if mishandled. Proper ventilation and disposal of used solvents are necessary to avoid health risks or environmental harm.

7. **Not a Permanent Fix for Underlying Issues** If the engine has other problems (e.g., vacuum leaks, worn ignition components, or fuel system issues), rebuilding the carburetor alone won t resolve them. You may need to address the entire fuel/air system for optimal results.

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The WSM WPS12-1129 rebuild kit is a **solid choice** for restoring or maintaining a Weber 12-1129 carburetor, especially if the carburetor is otherwise in decent condition. It offers a balance of quality, compatibility, and cost-effectiveness, making it ideal for enthusiasts who want to preserve or enhance their vehicle s performance without the expense of a new carburetor.

However, the decision to purchase this kit depends on your **experience level, time availability, and the overall condition of the carburetor**. If you re a first-time builder or the carburetor is in poor shape, you may want to consider hiring a professional or investing in a new carburetor. For those with moderate mechanical skills and patience, this kit is a practical and rewarding project.

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- You have a Weber 12-1129 carburetor that needs attention but is structurally sound.

- You re willing to invest time in learning the rebuild process or have some experience with carburetors.

- You want to restore performance at a fraction of the cost of a new carburetor.

- You re prepared to follow instructions carefully and use proper tools.

- The carburetor is heavily corroded, cracked, or internally damaged you may need a replacement.

- You lack the time or patience for a DIY rebuild hire a professional or buy a used/refurbished carburetor.

- Your engine has other issues (e.g., vacuum leaks, ignition problems) that need addressing alongside the carburetor.

For most enthusiasts with a functional Weber 12-1129, this rebuild kit is a **worthwhile investment** that can extend the life of the carburetor and improve engine performance. Pair it with a good carburetor cleaning solvent (like CRC or Jet-X) and take your time during assembly to ensure the best results.

Details:

1998 2003KawasakiJH 1100 A Xxi, 1998 - 1999 Crosschecked STX, 1999 2005KawasakiJH 1200 Ultra 150, 1999 2006KawasakiJT 900 2001 - 2002 Crosschecked B STS, 2002 2005KawasakiJT STX-R. Not for use with constant velocity carburetors. This fitment information is based upon the stock version of motorcycle or unit referenced and any accessory added other modification could invalidate quick reference provided. Wsm 12-1129 006-347 CARBURETOR REBUILD KIT.

part #: wps121129 prices

• $70.94-$81.99

specifications jetskiintakeez:

• brand: Wsm
• mpn: Wps12-1129
• part type: Carburetor
• universal: No

general jetskiintakeez:

• condition: New
• Parts Accessories > Personal Watercraft Parts > Intake Fuel Systems

returns jetskiintakeez:

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

offer jetskiintakeez:

• options: Ship-to-home
• quantity: 9
• sold: 0
• availability: In Stock
• started: April 13, 2026

payments jetskiintakeez:

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

seller jetskiintakeez:

• # reviews: 4263
• city: Omaha, NE
• rating: 100.0%

shipping jetskiintakeez:

• cost: $9.95
• class: Standard, Expedited
• transit: 2-4 Days
• type: Fixed
• service: FedEx Ground / FedEx Home Delivery, USPS Priority Mail, USPS Ground Advantage, UPS Ground
• carrier: FedEx, USPS, UPS

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