PROX

PROX 99101-357 Keihin Hex Main Jet 148

Name: PROX 99101-357 Keihin Hex Main Jet 148
Brand: PROX
SKU: 99101-357

Precision Fueling: Pro X Keihin Hex Main Jet The Pro X 99101-357 Series Keihin Hex Main Jet is a high-quality aftermarket jet designed for Keihin carburetors. Engineered for precision and reliability, this jet ensures optimal fuel delivery for enhanced engine performance. Perfect for motorcycle e...

$16.95*

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*Price sourced from Amazon.com. Last updated:Aug 28, 2026.Price and availability are subject to change — details.

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Overview

Precision Fueling: Pro X Keihin Hex Main Jet

The Pro X 99101-357 Series Keihin Hex Main Jet is a high-quality aftermarket jet designed for Keihin carburetors. Engineered for precision and reliability, this jet ensures optimal fuel delivery for enhanced engine performance. Perfect for motorcycle enthusiasts and professional mechanics alike, this jet provides consistent and dependable fueling.

Key Features:

High-quality aftermarket jet
Designed for Keihin carburetors
Ensures optimal fuel delivery

Detailed Specifications:

Brand: PROX
Model: 99101-357
Type: Keihin Hex Main Jet

Key Features

This product cannot be sold to residents in the state of California.

High quality aftermarket jets for Keihin carburetors.

Specifications

Brand

PROX

Product Type

Keihin Hex Main Jet

Jet Size

148

Frequently Asked Questions

What is the size of this PROX Keihin Hex Main Jet?

This PROX Keihin Hex Main Jet is a size 148.

Which carburetors is this main jet designed for?

This main jet is specifically designed for Keihin carburetors.

Is this product available for purchase in California?

No, this product cannot be sold to residents in the state of California.

Is this an OEM (Original Equipment Manufacturer) part?

No, it is described as a high quality aftermarket jet for Keihin carburetors.

What is the purpose of a main jet like this?

A main jet controls the fuel flow at mid-to-high RPMs in a carburetor, crucial for engine performance tuning.

Strengths & Trade-offs

👍 Pros

Manufactured by PROX, known for producing high-quality aftermarket parts for powersports applications
Specifically designed as a Keihin Hex Main Jet 148, ensuring precise fit and function for compatible carburetors
Offers an exact replacement or tuning option for Keihin carburetors, aiding in engine performance optimization
As an aftermarket jet, it provides an alternative to original equipment manufacturer (OEM) parts, potentially at a different value
Useful for fine-tuning fuel mixtures in carburetors, which can impact engine response and efficiency

👎 Cons

This product cannot be sold to residents in the state of California, limiting its availability for some customers
As a carburetor jet, its installation requires mechanical knowledge and tools, not suitable for all users
Only compatible with Keihin carburetors, meaning it is not universally applicable to other carburetor brands
A main jet is a single component, and adjusting it often requires diagnostic expertise to achieve optimal engine tuning
Specific details on the materials or manufacturing process that differentiate it from other jets are not provided