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Start ShoppingMIKUNI Large Round Main Jet 117.5 - High-Performance Brass Jet for Powersports Engines
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Description
Upgrade your powersports engine's fuel delivery system with MIKUNI's Large Round Main Jet 117.5. This precision-engineered brass jet delivers consistent fuel flow for enhanced performance, responsiveness, and reliability in high-output engines.
Key Features
- 117.5 Jet Size: Optimized for high-performance engines requiring precise fuel metering at 4 inches Hg.
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in demanding environments.
- Clip-On Design: Easy installation with 0.130 inch orifice for seamless integration with carburetor systems.
- Lightweight Build: Under 1 gram for minimal impact on engine balance and performance.
Why Choose This Product
MIKUNI's Large Round Main Jet 117.5 delivers unmatched precision and reliability for powersports enthusiasts. Its calibrated orifice size ensures optimal fuel-air mixture, while the brass material resists wear and maintains accuracy over time. The clip-on style simplifies installation, making it an ideal upgrade for riders seeking improved throttle response and fuel efficiency without compromising engine longevity.
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Upgrade your powersports engine's fuel delivery system with MIKUNI's Large Round Main Jet 117.5. This precision-engineered brass jet delivers consistent fuel flow for enhanced performance, responsiveness, and reliability in high-output engines.
Key Features
- 117.5 Jet Size: Optimized for high-performance engines requiring precise fuel metering at 4 inches Hg.
- Brass Construction: Durable, corrosion-resistant material ensures long-lasting performance in demanding environments.
- Clip-On Design: Easy installation with 0.130 inch orifice for seamless integration with carburetor systems.
- Lightweight Build: Under 1 gram for minimal impact on engine balance and performance.
Why Choose This Product
MIKUNI's Large Round Main Jet 117.5 delivers unmatched precision and reliability for powersports enthusiasts. Its calibrated orifice size ensures optimal fuel-air mixture, while the brass material resists wear and maintains accuracy over time. The clip-on style simplifies installation, making it an ideal upgrade for riders seeking improved throttle response and fuel efficiency without compromising engine longevity.| SKU | GMAA3B7A5A |
|---|---|
| MPN | FN100604-117.5 |
| Brand | MIKUNI |
| Category | Jets |
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Featured Review
| Make | Model | Years |
|---|---|---|
| Various | Mikuni TM/HPM/VM series carburetors | 1980-2025 |
| Honda | TRX series ATVs (e.g., TRX300, TRX400) | 2000-2024 |
| Yamaha | YZ/WR dirt bikes, Banshee ATVs | 1998-2024 |
Frequently Asked Questions
Fits Mikuni TM round slide (34/38/40mm), HPM needle jet type, and most VM series carbs on dirt bikes, ATVs, and snowmobiles.
Use plug chop method or wideband O2 sensor; typically for mid-range tuning at sea level or richer for high altitude.
Yes, OEM Mikuni part number FN100604-117.5, not aftermarket.
No, Mikuni jets are not interchangeable with Keihin/PWK without adapter.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove carb bowl fully, use carb cleaner to inspect old jet, count turns on air/fuel screws before removal
Common Mistakes to Avoid
- Dropping the tiny jet into the carb body
- Not cleaning carb before install
Comparison vs Stock/OEM
Direct OEM replacement for factory Mikuni jets
Improvements
- Precise fuel metering for performance tuning
- Consistent manufacturing tolerances
Considerations
- Stock jets may be sized differently; rejetting optimizes A/F ratio beyond stock
Durability & Warranty
Expected Lifespan
Indefinite with proper carb maintenance (does not wear out)
Warranty
Mikuni lifetime against manufacturing defects
Maintenance
Inspect for corrosion or debris during carb cleans every 10-20 hours
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