Prox Idle Spray Nozzle for Keihin Carburetor Size 58

The Prox 58 size idle jet is a precision component from the Mikuni line, designed for Keihin carburetors. Ideal for enthusiasts and professionals seeking a reliable idle adjustment for smooth starts and stable idle speed.

• Type: Idle jet for Keihin carburetors
• Size: 58 — precise orifice for consistent air-fuel ratio during idle operation
• Compatibility: Fits Keihin carburetors; backed by Mikuni quality
• Material: High-precision brass for durability and reliable fuel flow
• Brand/Series: Mikuni Prox line — built with decades of carburetion expertise
• Part Number: JU-46.058

With this idle jet, you’ll improve low-RPM throttle control, leading to smoother starts and stable idle speed across varying temperatures and loads. The precise orifice delivers consistent fuel delivery during idle, reducing sputtering and supporting overall carburetion performance. This component is a practical, maintenance-focused choice for anyone looking to precisely tune their Keihin carburetor without complicated installation.