Mikuni Jet Needle HSR45 Standard Taper - 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.
This Mikuni jet needle is a direct replacement for HSR45 carburetors, featuring the standard taper profile. It's engineered to regulate fuel atomization and metering throughout the engine's RPM range, crucial for consistent throttle response and fuel economy. Manufactured to OEM Mikuni specifications, it's ideal for maintaining or restoring factory performance on V-twin motorcycles.
Why riders pick this
- Standard taper profile for HSR45 carbs
- Direct replacement for V-twin applications
- Regulates fuel atomization and metering
- Manufactured to OEM Mikuni specifications
- Essential for maintaining consistent performance
Maintaining the integrity of your Mikuni HSR45 carburetor is essential for your V-twin's performance. The jet needle is a central component, influencing fuel delivery and atomization across the entire RPM range. This standard taper jet needle is a genuine Mikuni OEM replacement, ensuring your HSR45 carburetor operates as it was designed. Whether you're refreshing an older carb or performing routine maintenance, this needle provides the consistent, reliable fuel metering needed for optimal engine operation on your Harley or Indian motorcycle.
Restore Factory Carburetor Performance
- Standard taper profile for balanced fuel delivery
- Direct replacement for Mikuni HSR45 carburetors
- Regulates fuel atomization and metering across RPM range
- Manufactured to genuine Mikuni OEM specifications
Essential for Carburetor Maintenance
Consistent fuel delivery is key to a well-running V-twin. If your existing jet needle is worn or damaged, it can lead to inconsistent performance, poor throttle response, and reduced fuel economy. Installing this standard Mikuni jet needle helps restore your HSR45 carburetor to its original specifications, ensuring reliable and predictable engine behavior. It's a fundamental part of any comprehensive carburetor maintenance or rebuild, guaranteeing your V-twin runs strong.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FJ8-8CFY02-97
- Length: 4.4 in
- Width: 2 in
- Height: 0.4 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
Will this jet needle fit my Mikuni HSR45 carburetor?
Yes, this is the standard replacement needle for Mikuni HSR45 carburetors, manufactured to genuine OEM Mikuni specifications for a precise fit and reliable performance.
What does a jet needle do in a carburetor?
The jet needle regulates fuel atomization and metering across the engine's RPM range, particularly influencing the mid-range throttle response and overall fuel economy of your V-twin engine.
Can I use this for carburetor tuning?
Yes, swapping jet needles is a common jetting adjustment for fine-tuning fuel delivery on Mikuni HSR45 carbs. This standard needle provides a baseline for further adjustments if needed.
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 | Intake/Carb/Fuel System |
| SKU | 14-2502 |
| WEIGHT | 0.05 lb |
