PROX
PROX 4/042 Series Mikuni Hex Main Jet 510
Precision-sized Mikuni hex main jet for dialing in fuel delivery on KTM 150 XC-W two-strokes.
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Overview
Precision Fuel Delivery for Optimal Performance
The Pro X 4/042 Series Mikuni Hex Main Jet is designed for KTM 150 XC-W (E-Start) 2017-2018 models. This high-quality aftermarket jet ensures precise fuel delivery, contributing to optimal engine performance.
- Compatibility: KTM 150 XC-W (E-Start) 2017-2018
- Type: Mikuni Hex Main Jet
- Series: 4/042 Series
Pros & Cons
👍 Pros
- Precise sizing allows fine-tuning of fuel mixture for optimal engine performance
- Direct-fit replacement for Mikuni carburetors on supported KTM models
- Hex shape allows easy installation and removal with a standard wrench
- Affordable way to adjust jetting for altitude or temperature changes
- Durable brass construction consistent with OEM jet quality
👎 Cons
- Only compatible with KTM 150 XC-W (E-Start) 2017-2018, limiting its application
- Single jet size means you may need to purchase multiple sizes to find the ideal tune
- Requires basic carburetor knowledge to select the correct jet for your conditions
- Small part that is easy to drop or lose during installation
Frequently Asked Questions
What vehicles is this main jet compatible with?
It is designed specifically for the KTM 150 XC-W (E-Start) 2017-2018 models equipped with Mikuni carburetors.
What jet size is this?
This is a size 510 main jet in the ProX 4/042 series Mikuni hex format.
Is this an OEM part or aftermarket?
It is an aftermarket replacement jet manufactured by ProX to match OEM Mikuni hex main jet specifications.
How do I know if I need this specific jet size?
Jet sizing depends on your altitude, temperature, and any engine modifications. A 510 is typically used for specific tuning needs — consult a jetting chart for your riding conditions.
Does this jet require any modification to install?
No. It is a direct drop-in replacement that threads into the Mikuni carburetor's main jet holder without modification.
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