Mikuni Jet Needle HSR45 Richest 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 specifically designed for HSR45 carburetors, featuring the richest taper specification. It precisely controls fuel delivery in the critical mid-range throttle position. This genuine Mikuni OEM part is a direct replacement for V-twin motorcycle applications requiring maximum fuel flow in this range.
Why riders pick this
- Richest taper for increased mid-range fuel
- Direct fit for Mikuni HSR45 carburetors
- Compensates for lean running conditions
- Genuine Mikuni OEM replacement part
- Essential for precision carb tuning
When tuning your V-twin with an HSR45 Mikuni carburetor, the jet needle plays a crucial role in shaping your mid-range fuel delivery. This particular needle offers the richest taper, meaning it provides the most fuel in the mid-throttle range. This is often necessary to compensate for lean running conditions, high-altitude riding, or specific engine modifications that demand a richer mixture for optimal performance and engine longevity. It's an essential component for fine-tuning your carburetor's fuel curve.
Unlock Optimal Mid-Range Performance
- Richest taper designation for maximum mid-range fuel delivery
- Direct replacement for Mikuni HSR45 carburetors
- Essential for custom tuning and addressing lean conditions
- Genuine Mikuni OEM component for reliable performance
Precision Tuning for Your HSR45
Achieving a perfectly tuned carburetor means matching components like the jet needle to your engine's specific needs. If your V-twin feels lean in the mid-range or you're looking to dial in a custom build, this richest taper jet needle provides the fuel flow required. Pair it with other Mikuni jetting components to create a comprehensive fuel curve that delivers strong, consistent power across the entire RPM range for your Harley or Indian motorcycle.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FJ8-8CFY02-95
- Length: 4.7 in
- Width: 2.7 in
- Height: 0.4 in
- Weight: 0.05 lbs
- Country of Origin: Japan
Common questions
What does the richest taper jet needle do?
The richest taper designation provides the most fuel delivery in the mid-range throttle position. This helps compensate for lean running conditions, high-altitude riding, or specific engine builds that require a richer mixture.
Will this jet needle fit my Mikuni HSR45 carburetor?
Yes, this needle is a direct replacement for any Mikuni HSR45 carburetor. It's designed for riders who need the richest taper specification for their tuning needs.
Can I swap between different taper jet needles?
Yes, different Mikuni needle tapers are used to control the fuel mixture at mid-range throttle. You can swap them to fine-tune your carburetor's performance. Always verify your current needle part number if you're unsure.
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 | 14-2500 |
| WEIGHT | 0.05 lb |
