Your cart is empty
Start ShoppingMIKUNI Large Round Main Jet 147.5 - Precision Fuel Metering Carburetor Jet for High-Performance Engines
Fits your
May not fit your
Description
Upgrade your carburetor's fuel delivery system with the MIKUNI Large Round Main Jet (147.5). This precision-engineered component ensures optimal fuel metering across mid-to-high RPM ranges, delivering consistent power and efficiency for demanding riding conditions.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- 147.5 Size: Specifically calibrated for precise fuel-air mixture control in high-performance engines.
- Large Round Design: Promotes smooth fuel flow and reduces clogging risks for reliable operation.
- Precision Engineering: Manufactured to exact tolerances for seamless integration with Mikuni carburetor systems.
Why Choose This Product
Whether you're tuning a sport bike, off-road vehicle, or high-revving engine, this main jet delivers unmatched accuracy in fuel metering. Its robust brass construction resists wear and corrosion, while the large round shape ensures consistent fuel flow under extreme conditions. Perfect for riders seeking to maximize power output and fuel efficiency without compromising reliability.
Delivery
Checking availability...
Estimated arrival
Order within to ship today
Orders ship
Shipping to
Enter your ZIP code for delivery estimate
Price Match Guarantee
Found it cheaper?
Log in to submit a price match request.
Price
Quantity
Free Shipping $100+
14-Day Returns
Secure Checkout
Price Match
Complete the Build
This item
$21.85
In Cart
Upgrade your carburetor's fuel delivery system with the MIKUNI Large Round Main Jet (147.5). This precision-engineered component ensures optimal fuel metering across mid-to-high RPM ranges, delivering consistent power and efficiency for demanding riding conditions.
Key Features
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in harsh environments.
- 147.5 Size: Specifically calibrated for precise fuel-air mixture control in high-performance engines.
- Large Round Design: Promotes smooth fuel flow and reduces clogging risks for reliable operation.
- Precision Engineering: Manufactured to exact tolerances for seamless integration with Mikuni carburetor systems.
Why Choose This Product
Whether you're tuning a sport bike, off-road vehicle, or high-revving engine, this main jet delivers unmatched accuracy in fuel metering. Its robust brass construction resists wear and corrosion, while the large round shape ensures consistent fuel flow under extreme conditions. Perfect for riders seeking to maximize power output and fuel efficiency without compromising reliability.| SKU | GM5C0FC081 |
|---|---|
| MPN | FN100604-147.5 |
| Brand | MIKUNI |
| Category | Jets |
0.0
0 reviews
0
Log in to write a review.
Reviews
No reviews yet. Be the first to review this product!
Featured Review
| Make | Model | Years |
|---|---|---|
| Various Japanese | Carbureted motorcycles/ATVs (e.g., Honda XR series, Yamaha YZ/WR, Kawasaki KX, Suzuki RM) | 1980-2025 |
| Honda | CRF250R, CRF450R | 1990-2010 |
| Yamaha | YZ250F, WR250F | 2000-2020 |
Frequently Asked Questions
The main jet controls fuel flow to the carburetor's main circuit, which operates during mid-to-high RPM ranges. It's critical for proper engine performance and fuel economy.
Signs you may need jetting changes include: engine running too lean (hesitation, popping on decel), running too rich (black smoke, fouled plugs), or altitude/temperature changes. Consult your carburetor manual or tuning guide.
Jet sizes are measured in precise increments. A 147.5 is slightly larger than 147.0, allowing more fuel flow. Larger numbers = richer mixture, smaller numbers = leaner mixture.
Yes, if you're comfortable removing and disassembling your carburetor. It's a straightforward task but requires care to avoid damaging gaskets and seals. First-timers should allow 30-45 minutes.
Yes. Performance modifications (intake, exhaust, porting) typically require rejetting to maintain proper air-fuel ratio. Consult tuning guides specific to your modifications.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Carburetor removal tools (varies by application)
- Small screwdrivers
- Gasket scraper or plastic tool
- New gaskets (recommended)
Pro Tips
- Always use new gaskets when disassembling carburetor
- Clean carburetor thoroughly with carburetor cleaner before reassembly
- Hand-tighten jet gently - do not force
- Take photos during disassembly for reference
- Have carburetor cleaning supplies ready
Common Mistakes to Avoid
- Not replacing gaskets during reassembly (causes fuel leaks)
- Over-tightening jet (can damage brass)
- Installing wrong jet size for application
- Not cleaning carburetor passages before reassembly
Durability & Warranty
Expected Lifespan
Indefinite if properly maintained (brass doesn't wear)
Warranty
Typically manufacturer defect warranty only
Maintenance
No maintenance required - inspect for debris blockage during carburetor service
What Others Are Saying
Reviews from across the web
