Yamaha YZ250F & YZ450F DEF Racing Secondary Dual Injector Kit

Description

The DEF Racing Yamaha YZ250 and YZ450 Dual Injector (aka: Secondary Injector) was developed to refine engine response and improve power throughout the entire RPM range. This style injection system utilizing a shower type injector gives the rider a more connected feel to the crankshaft and rear wheel. These kits are designed for durability and hundreds of hours of abuse. Free Shipping! If you need an ECU with this kit please click here and fill out the options and add it to your cart https://def-racing.com/product/vortex-ecu/

Kit designed to work with:

• 2024-2026  YZ250F
• 2023-2026 YZ250F

Note:

• Airboot not included nor installed unless specified!
• Buy just the bare bones kit or have it installed and paired with the airboot of your choice by us before it ships, just use the drop-down menus!
• We recommend the 2023-current YZ450 airboot with the 2024-current YZ250F. The YZ450 airboot when installed on the YZ250 greatly improves low end power.
• The 24-current 250 airboot is not compatible with the 450 engine/chassis due to length!

Kit Includes:

• Injector Housing and Clamps
• Fuel Rail Kit – Directly connect fuel lines to the fuel rail
• Quick disconnect ‘T’ fitting
• Bosch MS Fuel Injector
• High Pressure Fuel Line
• Injector Wiring Harness to Connect to ECU (Please specify ECU type when ordering)
• High-Quality Stainless-Steel Hardware
• 3D Printed Airboot Adapter – YZ450 Airboot to YZ250 engine throttle body adapter (When using the YZ450 Airboot on the YZ250 engine)

An aftermarket ECU is required for the second injector harness connection (i.e., Vortex, GET, AIM). A calibration to suit your engine specification is also necessary. We offer ECU re-flashing and custom dyno tuning services for your machine.

If you need an ECU with this kit please click here and fill out the options and add it to your cart https://def-racing.com/product/vortex-ecu/