PROX

PROX 99101-357 Series Keihin Hex Main Jet 168

5.0 (1 reviews)

Optimize Your Carburetor PerformanceThe Pro X 99101-357 Series Keihin Hex Main Jet 168 is a high-quality aftermarket jet designed for Keihin carburetors. Compatible with Yamaha YFZ 450 models from 2004-2009, this jet ensures optimal fuel delivery and performance. Upgrade your carburetor with this...

$16.95*
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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

Optimize Your Carburetor Performance

The Pro X 99101-357 Series Keihin Hex Main Jet 168 is a high-quality aftermarket jet designed for Keihin carburetors. Compatible with Yamaha YFZ 450 models from 2004-2009, this jet ensures optimal fuel delivery and performance. Upgrade your carburetor with this reliable and durable jet for enhanced engine efficiency.

Key Features

See fitment guide image for additional Machines this item fits. 99101-357 Style.

High quality aftermarket jets for Keihin carburetors.

Specifications

Product Type
Hex Main Jet
Series
99101-357 Style
Jet Size
168
Compatibility
Keihin Carburetors
Brand
PROX

Pros & Cons

👍 Pros

  • Specifically designed as high-quality aftermarket jets for Keihin carburetors, ensuring compatibility.
  • The 99101-357 Series designation helps in accurate identification for specific Keihin models.
  • Provides a precise fuel delivery component (Main Jet 168) for tuning engine performance.
  • Manufactured by PROX, a brand known for its powersports components.
  • Can be used to fine-tune carburetors for optimal engine running conditions and performance.

👎 Cons

  • Requires specific knowledge of carburetor tuning to install and adjust correctly.
  • Only compatible with Keihin carburetors of the 99101-357 Series, limiting its universal application.
  • The "Main Jet 168" is a specific size, meaning it may not be the correct fit for all engine setups.
  • The product is a single component and requires other parts of the carburetor to be in good working order.
  • Improper installation or selection of the wrong jet size can negatively impact engine performance.
  • Does not specify material composition, which could be a factor in long-term durability or corrosion resistance.

Frequently Asked Questions

This PROX 99101-357 Series Hex Main Jet 168 is designed for use with Keihin carburetors.
This main jet has a size of 168, as indicated by "Main Jet 168" in the product title.
No, this is specified as a "High quality aftermarket jet for Keihin carburetors" from the PROX brand.
The product description suggests referring to the "fitment guide image for additional Machines this item fits" to ensure compatibility.
"99101-357 Series" refers to the style or type of Keihin hex main jet that this PROX jet is designed to replace or be compatible with.
Yes, replacing and tuning carburetor jets typically requires specific mechanical knowledge to ensure proper engine function and performance.