✓ VERIFIED
Oct 12, 2021
Great quality for a great price
MIKUNI
SKU: 134-71275
Mikuni Large Round Main Jet #127.5 4-Pack - Harley & Indian V-Twin
$20.79
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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.
Get your Mikuni-equipped V-twin dialed in with this 4-pack of genuine Mikuni Large Round Main Jets in #127.5 size. These jets are critical for fine-tuning your air/fuel mixture at cruise and part-throttle, ensuring your Harley or Indian engine performs optimally. Precision fuel metering is key to unlocking your bike's full potential.
Why riders pick this
- Genuine Mikuni OEM parts for reliable operation
- Exact #127.5 size for precise fuel calibration
- Large round style for specific Mikuni carburetors
- 4-pack for tuning flexibility or keeping spares
- Key component for optimizing air/fuel ratio
Whether you're compensating for altitude changes, a new air cleaner, or a performance exhaust, having the right main jet is essential for a carbureted V-twin. This 4-pack of #127.5 Mikuni Large Round Main Jets provides the genuine components you need to precisely meter fuel flow. Avoid lean conditions or rich bogging by accurately matching your jetting to your engine's demands.
Optimized Fueling for Performance
- Genuine Mikuni quality for consistent fuel delivery
- #127.5 size for fine-tuning your air/fuel mixture
- Large round design fits specific Mikuni carburetors
- 4-pack provides flexibility for tuning or spares
Tune Your Carburetor with Confidence
Tuning a V-twin carburetor requires attention to detail, and the main jet is a cornerstone of that process. These Mikuni jets allow you to make precise adjustments, ensuring your Harley or Indian motorcycle runs smoothly and efficiently. Having a multi-pack on hand means you're prepared for any necessary adjustments to maintain peak performance.
Specifications
- Brand: Mikuni
- Manufacturer Part #: FN100604-127.5
- Quantity: 4 per pack
- Country of Origin: Japan
Common questions
What's the purpose of a main jet?
The main jet controls the amount of fuel delivered to the engine at cruise and mid-range throttle positions. It's crucial for maintaining the correct air/fuel ratio for performance and engine health.
Will these fit my Indian Motorcycle with a Mikuni carb?
These jets are designed for V-twin motorcycles that use Mikuni carburetors with large round main jets. It's always best to verify your specific carburetor model and the style of your existing jets before purchasing.
Why are main jet changes often needed?
Changes in altitude, air filter upgrades, or exhaust system modifications all affect airflow and can necessitate a change in main jet size to maintain optimal engine performance and prevent lean or rich conditions.
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 | 134-71275 |
| WEIGHT | 0.05 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
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✓ VERIFIED
Mar 27, 2021
It's an oem Mikuni jet not much to say.
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Mar 25, 2021
Great product packaging very good
✓ VERIFIED
May 16, 2020
good part
✓ VERIFIED
Sep 27, 2019
5 Stars
✓ VERIFIED
Jul 2, 2015
Fast shipping, very satisfied
