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 HSR float assembly is engineered to precisely regulate the fuel level inside your carburetor bowl, a critical function for consistent engine performance. This direct OEM replacement ensures your carbureted V-twin motorcycle receives the proper fuel supply. Why riders pick this Genuine Mikuni OEM part Precise fuel level regulation Direct HSR replacement fit Manufactured for reliable performance A properly functioning float is essential for maintaining the correct fuel level in your Mikuni HSR carburetor. If your float is damaged or saturated, it can lead to an incorrect fuel mixture, causing issues like fuel starvation or overflow. This genuine Mikuni float assembly restores reliable fuel level regulation, ensuring your Harley or Indian V-twin runs smoothly and efficiently.Consistent Fuel Level Control Genuine Mikuni OEM float assembly Precise fuel level regulation inside the carb bowl Direct replacement for Mikuni HSR carburetors Manufactured for reliable V-twin performance Optimizing Carburetor PerformanceThe float works in conjunction with the needle and seat to control fuel flow into the bowl. Replacing a faulty float assembly is a key step in carburetor maintenance and tuning, preventing both lean and rich conditions that can hinder your V-twin's power and rideability. Install this Mikuni float to ensure your HSR carburetor maintains optimal fuel metering, providing consistent performance on every ride. Specifications Brand: Mikuni Manufacturer Part #: F859-32027 Length: 4 in Width: 3.4 in Height: 1.2 in Weight: 0.1 lbs Country of Origin: Japan Common questions Will this float assembly fit my Mikuni HSR carburetor? Yes, this is a direct OEM replacement float assembly specifically designed for Mikuni HSR carburetors found on V-twin motorcycles. What is the function of the float in a carburetor? The float's primary role is to regulate the fuel level inside the carburetor bowl. By opening and closing the needle valve, it maintains a consistent fuel supply, which is crucial for proper fuel metering to the engine. Is this a direct bolt-in replacement, or does it require modifications? Yes, this is a direct bolt-in OEM replacement. It installs directly into your existing Mikuni HSR carburetor without requiring any modifications. 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. {"@context":"https://schema.org","@type":"BreadcrumbList","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https://vtwinbikers.com"},{"@type":"ListItem","position":2,"name":"Intake/Carb/Fuel System","item":"https://vtwinbikers.com/collections/all"},{"@type":"ListItem","position":3,"name":"Mikuni","item":"https://vtwinbikers.com/collections/mikuni"},{"@type":"ListItem","position":4,"name":"Mikuni Float Assembly - HSR Carburetor","item":"https://vtwinbikers.com/products/mikuni-float-hsr-14-2509"}]} {"@context":"https://schema.org","@type":"FAQPage","mainEntity":[{"@type":"Question","name":"Will this float assembly fit my Mikuni HSR carburetor?","acceptedAnswer":{"@type":"Answer","text":"Yes, this is a direct OEM replacement float assembly specifically designed for Mikuni HSR carburetors found on V-twin motorcycles."}},{"@type":"Question","name":"What is the function of the float in a carburetor?","acceptedAnswer":{"@type":"Answer","text":"The float's primary role is to regulate the fuel level inside the carburetor bowl. By opening and closing the needle valve, it maintains a consistent fuel supply, which is crucial for proper fuel metering to the engine."}},{"@type":"Question","name":"Is this a direct bolt-in replacement, or does it require modifications?","acceptedAnswer":{"@type":"Answer","text":"Yes, this is a direct bolt-in OEM replacement. It installs directly into your existing Mikuni HSR carburetor without requiring any modifications."}}]}
