✓ VERIFIED
Mar 10, 2022
Fit perfect !
MIKUNI
SKU: 14-2009
Mikuni Idle Screw Adjuster - Harley & Indian V-Twin Carburetors
$31.43
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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.
The Mikuni Idle Screw Adjuster is a precision-machined OEM replacement component for V-twin motorcycle carburetors. This adjuster allows for accurate fine-tuning of your fuel-air mixture at idle, ensuring smooth running and optimal response. Manufactured in Japan to original Mikuni specifications, it guarantees the quality and performance you expect.
Why riders pick this
- Genuine OEM Mikuni component
- Precision-machined for accurate adjustments
- Fine-tunes fuel-air mixture at idle
- Made in Japan to original specifications
Achieve perfect idle on your V-twin with the Mikuni Idle Screw Adjuster. This genuine Mikuni component is crucial for precise control over your carburetor's idle circuit, letting you dial in the fuel-air mixture for consistent engine operation. Whether you're compensating for elevation changes or simply optimizing your bike's low-end performance, this adjuster provides the granular control needed for a crisp, stable idle.
OEM Quality for Precision Tuning
- Genuine OEM Mikuni component for reliable performance
- Precision-machined for accurate idle mixture adjustments
- Made in Japan to strict Mikuni specifications
- Essential for fine-tuning carbureted V-twin engines
Optimize Your Carburetor's Idle
A properly adjusted idle circuit is fundamental to a well-running carbureted V-twin. The Mikuni Idle Screw Adjuster makes this process straightforward, allowing riders to achieve the ideal idle RPM and mixture. This small but significant upgrade is perfect for routine maintenance or for those looking to get every ounce of performance out of their Mikuni-equipped Harley or Indian motorcycle.
Specifications
- Brand: Mikuni
- Manufacturer Part #: F990-605-065
- Weight: 0.1598 lbs
- Country of Origin: Japan
Common questions
Will this idle screw adjuster fit my stock Harley-Davidson carburetor?
This adjuster is designed for V-twin motorcycle carburetors equipped with Mikuni carbs. Stock Harley-Davidson carburetors typically use different idle adjusters, so verify your carburetor brand before ordering.
Is this a genuine Mikuni part?
Yes, this is a genuine OEM Mikuni component, precision-machined and made in Japan, ensuring it meets original factory specifications.
How do I use this part to adjust my idle?
Once installed, you can turn the adjuster screw clockwise to lean the idle mixture or counterclockwise to enrich it. Always consult your carburetor's service manual for the proper idle RPM and adjustment procedures for your specific setup.
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 | 14-2009 |
| WEIGHT | 0.16 lb |
Please contact us to confirm fitment for your specific motorcycle, or check the product title for compatibility notes.
CUSTOMER REVIEWS
4.83
6 RATINGS
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✓ VERIFIED
May 13, 2014
Really couldn't stand the look of the dangling adjuster. Screw the old one out, transfer the spring, screw this one in and you're done. Also, you can still adjust the idle speed while sitting in the seat (on my 94 WG). Highly recommended.
✓ VERIFIED
May 13, 2014
Very nice piece. You do need to remove the switch housing on that side, drill out the existing hole and tap it. (Tap not included but a standard size). Works precisely as it should and a big improvement over the stock set up. Oh and it looks great too.
✓ VERIFIED
Sep 25, 2012
great product just what I needed.
✓ VERIFIED
May 5, 2012
very nice unit.
✓ VERIFIED
Jan 4, 2011
Solves the dangly speedometer cable effect of the stock idle screw, easily modified. I put a chrome dice on the end of mine and it looks trick.
