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Start ShoppingMIKUNI #100 Large Round Main Jets - Brass Jets for Precision Fuel Metering
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Description
Upgrade your MIKUNI carburetor with these precision-engineered #100 large round main jets. Designed for accurate fuel metering, these brass jets ensure optimal engine performance, responsiveness, and fuel efficiency across a range of powersports applications.
Key Features
- Brass Construction: Durable, corrosion-resistant material for long-lasting performance in harsh environments.
- #100 Jet Size: Precise metering for #100 size carburetors, ensuring consistent fuel delivery.
- Large Round Orifice: 0.24" diameter design for improved fuel flow and engine responsiveness.
- Lightweight Design: Only 0.1 oz (3 grams) for minimal impact on engine balance and performance.
Why Choose This Product
These MIKUNI jets deliver unmatched accuracy for fuel metering, making them essential for riders seeking peak engine performance. The brass material resists wear and corrosion, while the large orifice size ensures reliable fuel flow under varying conditions. Perfect for tuning carburetors in motorcycles, ATVs, and other powersports equipment, these jets offer a balance of precision, durability, and ease of installation.
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Upgrade your MIKUNI carburetor with these precision-engineered #100 large round main jets. Designed for accurate fuel metering, these brass jets ensure optimal engine performance, responsiveness, and fuel efficiency across a range of powersports applications.
Key Features
- Brass Construction: Durable, corrosion-resistant material for long-lasting performance in harsh environments.
- #100 Jet Size: Precise metering for #100 size carburetors, ensuring consistent fuel delivery.
- Large Round Orifice: 0.24" diameter design for improved fuel flow and engine responsiveness.
- Lightweight Design: Only 0.1 oz (3 grams) for minimal impact on engine balance and performance.
Why Choose This Product
These MIKUNI jets deliver unmatched accuracy for fuel metering, making them essential for riders seeking peak engine performance. The brass material resists wear and corrosion, while the large orifice size ensures reliable fuel flow under varying conditions. Perfect for tuning carburetors in motorcycles, ATVs, and other powersports equipment, these jets offer a balance of precision, durability, and ease of installation.
| SKU | GMF35CB8DF |
|---|---|
| MPN | FN100604-100 |
| Brand | MIKUNI |
| Category | Jets |
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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 | TT-R, YZ, WR series | 1985-2020 |
Frequently Asked Questions
Fits Mikuni VM, PF, BS, and HSR series carburetors with large round main jet provision. Not for small round jets.
Depends on engine mods, altitude, and temp. Use jet kit chart or dyno tune; #100 is stock for many 250-450cc bikes at sea level.
No, Mikuni jets are not directly interchangeable with Keihin/PWK styles. Confirm your carb brand.
Lean = smaller jet (white plug), rich = larger jet (black/wet plug). Perform plug chop test.
Installation Guide
Difficulty
Easy
Est. Time
5 min
Tools Required
- Small flathead screwdriver
- Jet wrench or needle nose pliers
Pro Tips
- Remove carb bowl completely for access; mark jet size before removal; test plug chop after install
Common Mistakes to Avoid
- Not cleaning carb passages before install
- Incorrect jet size selection for altitude/temp
Comparison vs Stock/OEM
Direct OEM replacement or upgrade for worn jets; precision machined brass same as factory
Improvements
- Consistent fuel metering
- Corrosion resistant
- Enables precise tuning for mods
Considerations
- Must select correct size; no performance gain without tuning
Durability & Warranty
Expected Lifespan
Indefinite with proper maintenance (lasts multiple rebuilds)
Warranty
Limited lifetime from Mikuni against defects
Maintenance
Inspect for damage/clogs during carb cleans; clean with carb cleaner only
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