Prox idle sprayer for Keihin carburetor size 42

The Prox size 42 idle jet is a precision component from the Mikuni product lineup, designed for Keihin carburetors. This new idle jet delivers consistent air-fuel ratios at low engine speeds and supports reliable starts and smooth idle operation.

• Type: Idle jet for precise adjustment of the idle air-fuel mixture
• Size: 42
• Compatibility: Fits Keihin carburetors; designed to work within Mikuni fuel systems
• Material: Brass, durable and corrosion-resistant
• Precision: Precision-drilled for stable idle performance and consistent throttle response
• Brand Quality: Mikuni quality with strict manufacturing standards and craftsmanship
• MPN: JU-46.042
• Condition: New

This idle jet is ideal for anyone looking to tune for low-RPM operation: better cold starts, smooth acceleration from idle, and reduced risk of stalling while idling. Its targeted drill size delivers the exact air-fuel mixture needed for crisp engine response, even across varying conditions such as temperature and altitude changes. It is particularly suited for classic motorcycles, off-road vehicles, and other vehicles with Keihin carburetors where reliable idle adjustment is critical.