Mikuni Large Round Main Jets #150 4-Pack - Harley & Indian V-Twin
About Mikuni
Mikuni has supplied carburetors and fuel-system components to the motorcycle industry for decades, and its HSR series remains a common choice for carbureted Evolution and Twin Cam V-twins where a clean, tunable fuel curve matters more than electronics.
Maximize your V-twin's performance with these genuine Mikuni large round main jets in size #150. Sold in a convenient 4-pack, these jets are crucial for precise carburetor tuning. They ensure optimal fuel flow during cruise and part-throttle operation on Harley-Davidson and Indian Motorcycle engines.
Why riders pick this
- Genuine Mikuni OEM quality for reliable performance
- Specific #150 jet size for targeted fuel control
- Precision-machined orifice ensures consistent fuel flow
- Includes four jets for comprehensive tuning options
Dialing in your Harley-Davidson or Indian Motorcycle's carburetor is essential for unlocking its true potential. These Mikuni large round main jets, specifically in the #150 size, provide the precise fuel metering needed for powerful, consistent performance. Whether you're compensating for air cleaner upgrades, exhaust modifications, or changes in riding elevation, these jets are a fundamental component in achieving the ideal air/fuel mixture.
Optimized Fuel Delivery
- Genuine Mikuni OEM jets for uncompromising quality
- #150 size for specific fuel enrichment needs
- Precision-machined orifice ensures consistent fuel flow
- 4-pack quantity provides tuning flexibility and valuable spares
Essential for Carburetor Tuning
The main jet plays a critical role in your V-twin's mid-range and top-end performance. Correct jetting prevents issues like hesitation, bogging, or excessive fuel consumption, leading to a smoother, more responsive ride. This 4-pack of Mikuni jets is an indispensable tool for any rider serious about optimizing their V-twin's engine for both daily riding and spirited performance.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-150
- Quantity: 4 per pack
- Jet Size: #150
- Length: 4.4 in
- Width: 2.2 in
- Height: 0.6 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What is the function of the main jet in a V-twin carburetor?
The main jet is responsible for metering fuel primarily during mid-range to wide-open throttle operation, ensuring the engine receives the correct fuel-air mixture for optimal power and efficiency at higher RPMs.
How do I determine if a #150 jet is the correct size for my motorcycle?
Proper jet sizing depends on various factors including your carburetor model, engine modifications, riding altitude, and ambient temperatures. Always consult your Mikuni carburetor manual or a professional tuner to confirm the appropriate jet size.
Are these Mikuni jets compatible with all Harley-Davidson and Indian Motorcycle models?
These genuine Mikuni large round main jets are designed for V-twin motorcycles that are equipped with Mikuni carburetors. They will not fit bikes using other carburetor brands, such as stock Keihin or S&S units, unless a Mikuni conversion has been performed.
Ordering from Vtwinbikers
- Brand new, sourced through authorized US distribution — never used, never grey-market.
- Not sure it fits? Use Shop by Bike to filter by your year and model, or email us and we will confirm before you order.
- Harley-Davidson and Indian Motorcycle is all we do, so you are talking to people who ride what you ride.
| BRAND | Mikuni |
| TYPE | Jets |
| SKU | 134-7150 |
| WEIGHT | 0.05 lb |
