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  3. WPS VM28/486-12.5

WPS VM28-486-12.5 Mikuni Jet Ttr VM28/486-12.5 50E

fits model: Vm28, Pilot. make: Yamaha. year: 2006–2023.

486-12.5 Wps Vm28/486-12.5 Mikuni Vm28/486 Pilot Jet 12.5 For Yamaha Ttr 50e 2006-2023

( Brand: Wps ), ( Manufacturer Part Number: VM28/486-12.5 ), ( Part Type: Jet ), ( Country Of Origin: Us ), ( Oe/oem Part Number: Vm28/486-12.56cf3-ea906f ), ( Item Length: 1.250 ), ( California Prop 65 Warning: Warning )

Review WPS Vm28/486-12.5 Mikuni Vm28/486 Jet Yamaha Ttr 50e fits PILOT VM28 2006–2023

The **Mikuni VM28/486 Pilot Jet 12.5** is a precision-engineered carburetor designed specifically for Yamaha s TTR 50E dual-sport and off-road motorcycles, spanning model years from 2006 through 2023. This high-performance carburetor replaces the stock Mikuni VM28/486 unit, delivering a refined blend of throttle response, fuel efficiency, and reliability tailored for both on-road and off-road adventures. Crafted from durable materials, including high-grade aluminum and stainless steel components, the VM28/486 Pilot Jet 12.5 ensures long-lasting performance under demanding conditions, whether tackling rugged trails or cruising on paved roads. Its compact yet robust design integrates a **12.5mm pilot jet**, a critical component that regulates idle and low-speed fuel delivery, ensuring smooth operation and consistent power output across varying engine speeds. The carburetor features a **Pilot Jet 12.5** a precision-machined orifice that fine-tunes fuel atomization, reducing hesitation and improving throttle response, particularly in high-altitude or dusty environments where air intake can be compromised. The VM28/486 is equipped with a **floating needle and seat assembly**, allowing for easy adjustment of the idle mixture and ensuring optimal fuel-air ratio for both cold starts and warm-up phases. Its **pilot jet design** also minimizes carbon buildup, a common issue in carbureted engines, by promoting cleaner combustion and reducing the risk of clogging. This carburetor is a direct drop-in replacement, compatible with the TTR 50E s stock mounting points and throttle linkage, making installation straightforward for both novice and experienced mechanics. Whether you re seeking improved acceleration, better fuel economy, or enhanced reliability in your Yamaha TTR 50E, the Mikuni VM28/486 Pilot Jet 12.5 delivers a noticeable upgrade in performance while maintaining the simplicity and durability that Mikuni carburetors are renowned for. Ideal for riders who demand precision engineering and dependable power, this carburetor is a testament to Mikuni s legacy of crafting carburetors that balance performance with practicality.

### **Pros and Cons of Upgrading to a Mikuni VM28/486-12.5 Pilot Jet for a Yamaha TTR 50E (2006 2023)**

#### **Pros:**

1. **Improved Throttle Response** The VM28/486-12.5 is designed for better mid-range and top-end power, making acceleration smoother and more responsive compared to the stock jet.

2. **Better Fuel Efficiency (Under Certain Conditions)** Some riders report improved fuel economy at lower RPM ranges due to optimized airflow and fuel delivery.

3. **Easier Cold Starts** The pilot jet s design can help with cold weather starts by providing a more consistent fuel mixture.

4. **Adjustability** Mikuni jets are known for their durability and ability to be fine-tuned for different riding conditions (e.g., high altitude, humid climates).

5. **Compatibility with Modifications** If you plan to add other performance upgrades (e.g., exhaust, carburetor tuning), this jet can integrate well.

6. **Long-Term Reliability** Mikuni parts are generally built to last, reducing the risk of frequent failures compared to aftermarket jets that may wear out quickly.

7. **Stock-Like Performance with a Boost** Unlike aggressive aftermarket jets that can make the bike feel harsh, this jet provides a subtle but noticeable improvement without excessive power surges.

#### **Cons:**

1. **Minimal Power Gain** The TTR 50E is already a low-power bike (around 2.5 3.5 HP), and this jet will not drastically increase speed or acceleration. Expect only slight improvements.

2. **Potential for Rich Mixtures** If not properly tuned, the jet can cause a slightly richer fuel mix, leading to reduced efficiency or even minor fouling of the spark plug over time.

3. **Cost vs. Benefit** The VM28/486-12.5 is not cheap, and the performance gains may not justify the expense for casual riders who don t push the bike hard.

4. **Requires Tuning** Unlike a simple drop-in replacement, achieving optimal performance may require adjusting the main jet, pilot needle, or even the carburetor idle mixture.

5. **Not a "Big Power" Upgrade** If your goal is to make the bike significantly faster (e.g., for racing or aggressive riding), this jet alone won t be enough you d need additional modifications (e.g., clutch, transmission, or engine tuning).

6. **Risk of Voiding Warranty (If Applicable)** If your bike is under warranty, modifying the carburetor could void coverage, though this is unlikely for a simple jet swap.

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### **Conclusion**

The **Mikuni VM28/486-12.5 Pilot Jet** is a **moderate upgrade** for the Yamaha TTR 50E, offering **slightly better throttle response, smoother power delivery, and improved cold-start reliability** without drastic changes. It is best suited for riders who want a **subtle performance enhancement** rather than a major power boost.

If you **rarely ride hard, prioritize fuel efficiency, or simply want a more refined feel**, this jet is a **worthwhile investment**. However, if you **plan to push the bike aggressively, race, or make extensive modifications**, you may need a more comprehensive approach (e.g., a full carburetor rebuild, exhaust, or even a different jet size).

For most **casual or commuter riders**, the stock jet may still be sufficient, and the cost of this upgrade might not be justified. **Test it on a track or in a controlled environment first** to ensure it meets your expectations before committing.

### **Recommendation:**

- **If you want a small but noticeable improvement** **Install the VM28/486-12.5 and tune it properly.**

- **If you re happy with stock performance** **Stick with the original jet unless you experience issues.**

- **If you plan major modifications** **Consider a full carburetor rebuild or a different jet size (e.g., 12.0 or 13.0) after testing.**

- **Always pair with a carburetor cleaning and tuning session** to ensure optimal results.

Would you like guidance on tuning steps or alternative jet options?

Details:

Designed for accurate low-speed fuel metering. Menu Mikuni VM28/486 Pilot Jet 12.5 For Yamaha TTR 50E 2006 -2023: 12.5: This Pilot jet is a precision fuel system component designed for smooth carburetor tuning and reliable throttle response. Jet size: 12.5. Great for tuning, rebuilding, or replacing a worn jet.

Features: Genuine Mikuni replacement Pilot jet. Untitled Document. Ideal for replacement or maintenance, this single jet is a direct-fit part identified by the VM28/486-12.5 number. Part number: VM28/486-12.5.

specifications intakefuelmotorcycle:

  • for models: Vm28, Pilot
  • for makes: Yamaha
  • for years: 2006-2023
  • brand: Wps
  • mpn: Vm28/486-12.5
  • part type: Jet
  • country of origin: Us
  • oe/oem part number: Vm28/486-12.56cf3-ea906f
  • item length: 1.250
  • california prop 65 warning: Warning

shipping intakefuelmotorcycle:

  • class: Expedited
  • service: Expedited, Expedited with Adult Signature required
  • type: Fixed
  • transit: 3-7 Days
  • cost: $0.00

general intakefuelmotorcycle:

  • Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery
  • condition: New

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offer intakefuelmotorcycle:

  • availability: In Stock
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  • options: Ship-to-home
  • started: April 6, 2026

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  • # reviews: 50152
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  • city: Midvale, Utah

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for models: vm28, pilot, for makes: yamaha, for years: 2006-2023, part type: jet, country of origin: us, oe/oem part number: vm28/486-12.56cf3-ea906f, item length: 1.250, california prop 65 warning: warning,
category: motorcycle parts > motorcycle scooter parts accessories > air intake fuel delivery, sku: 23340074490390773,
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