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Start ShoppingMIKUNI FN100604-152.5 Large Round Main Jets - High-Performance Fuel Flow Control for Racing & Off-Road Vehicles
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Description
Upgrade your carburetor's fuel delivery system with MIKUNI's Large Round Main Jets. These precision-machined components ensure consistent fuel flow for maximum power, responsiveness, and engine efficiency in high-performance applications.
Key Features
- Exact Fuel Flow Control: Fine-tune air-fuel ratios for improved throttle response and power delivery.
- Universal Compatibility: Designed for MIKUNI carburetors, ideal for motorcycles, ATVs, and racing engines.
- Durable Brass Construction: Resists corrosion and maintains precision under extreme operating conditions.
- Easy Installation: Simple replacement for quick performance upgrades without complex modifications.
Why Choose This Product
Whether you're racing or exploring rugged terrain, these main jets deliver reliable performance by maintaining optimal fuel metering. Their robust design ensures long-lasting accuracy, while the precise orifice size enhances engine efficiency. Perfect for riders seeking to unlock their vehicle's full potential through professional-level tuning.
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Upgrade your carburetor's fuel delivery system with MIKUNI's Large Round Main Jets. These precision-machined components ensure consistent fuel flow for maximum power, responsiveness, and engine efficiency in high-performance applications.
Key Features
- Exact Fuel Flow Control: Fine-tune air-fuel ratios for improved throttle response and power delivery.
- Universal Compatibility: Designed for MIKUNI carburetors, ideal for motorcycles, ATVs, and racing engines.
- Durable Brass Construction: Resists corrosion and maintains precision under extreme operating conditions.
- Easy Installation: Simple replacement for quick performance upgrades without complex modifications.
Why Choose This Product
Whether you're racing or exploring rugged terrain, these main jets deliver reliable performance by maintaining optimal fuel metering. Their robust design ensures long-lasting accuracy, while the precise orifice size enhances engine efficiency. Perfect for riders seeking to unlock their vehicle's full potential through professional-level tuning.
| SKU | GM852B6152 |
|---|---|
| MPN | FN100604-152.5 |
| Brand | MIKUNI |
| Category | Jets |
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Frequently Asked Questions
The main jet controls fuel flow through the carburetor at mid-to-high throttle positions. Larger numbers (like 152.5) allow more fuel flow, richer mixture, and are typically used for performance builds or high-altitude riding.
Jet size depends on your engine modifications, altitude, and desired performance. Consult your carburetor manual, manufacturer recommendations, or tuning guides. Start with OEM size and adjust based on plug color and performance.
This is a larger jet (152.5) than most stock applications. It's designed for modified engines or specific tuning needs. Verify compatibility with your specific carburetor model.
Yes, main jet replacement is a straightforward DIY task requiring basic tools. However, carburetor removal and reinstallation complexity varies by vehicle.
Each size increment (typically 2.5 or 5 units) represents a small change in fuel flow. Larger numbers = richer mixture. Changes of 10+ sizes noticeably affect performance and fuel consumption.
Installation Guide
Difficulty
Easy
Est. Time
15 min
Tools Required
- Screwdrivers (Phillips and flat-head)
- Small wrench or socket set
- Carburetor cleaning tools (optional but recommended)
Pro Tips
- Clean the carburetor thoroughly while disassembled
- Keep track of old jet size for reference
- Test ride and observe performance before final tuning
- Larger jets (like 152.5) typically indicate performance modifications or high-altitude use
- Consider replacing fuel filter and cleaning fuel lines during carburetor service
Common Mistakes to Avoid
- Over-tightening the jet (can damage brass)
- Not cleaning carburetor before reassembly
- Failing to verify correct jet size for application
- Not adjusting needle position if required
Comparison vs Stock/OEM
Improvements
- Richer fuel mixture for performance modifications
- Better throttle response on modified engines
- Suitable for high-altitude compensation
- Supports increased air intake from modifications
Considerations
- May increase fuel consumption
- Requires proper tuning to avoid fouling plugs
- May need needle position adjustment
- Not suitable for stock/unmodified engines
Durability & Warranty
Expected Lifespan
Indefinite if properly maintained; brass jets don't wear out
Warranty
Typically covered under manufacturer defect warranty (usually 1 year)
Maintenance
No maintenance required; replace only if damaged or when tuning
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