This custom-engineered 2nd injector kit will bring your engine's throttle response and power range to the next level. The stock injector works with this kit to maximize your bike's performance and overall feel. Made from billet aluminum for strength and weight savings. Carefully assembled by hand, into a real genuine Yamaha OEM airbox for long-lasting performance. A Vortex ECU with our custom 2nd injector mapping is required to run our 2nd injector kit! Click here to browse our Yamaha ECU product page.
Please DO NOT attempt to install this kit into a Yamaha YZ450F airbox! This kit was engineered specifically for the Yamaha YZ250F 2024-2025, period! Attempting to use this kit in an unintended application, would be unsafe for the bike and rider!
If you already have a Vortex ECU, you can reflash your current Vortex ECU Here.
We now have a meticulously made, step-by-step installation manual. We will send a QR code with your 2nd injector kit, for an online PDF.
We also recommend Using a Twin Air PowerFlow filter kit, to get the most benefits out of our 2nd injector setup.
Can I use this kit for the Yamaha YZ450F/YZ450F's airbox?
No.
This kit was engineered specifically for the Yamaha YZ250F 24-25, period! Installing this kit into any other bike or airbox is unsafe for the bike and rider! This kit was not designed to be disassembled!
Will I need anything besides this kit?
-This kit comes with everything you need, besides the 2nd injector mapped Vortex ECU.
-Our 2nd injector kits require a Vortex ECU that has our 2nd injector maps. Click here to browse our Yamaha Vortex ECU page.
If you already have a Vortex ECU, you can reflash your current Vortex ECU Here.
What performance gains can I expect with this kit?
Our 2nd injector kits are designed to improve overall throttle response and feel, while also providing a hard-hitting mid, to top-end power range.
Are there any other mods I can do along with this kit, to get more power?
We recommend a Twin Air PowerFlow Kit to maximize airflow, along with drilling out your airbox cover. During our dyno testing, we found the YZ250F's airbox cover to be undoubtedly restrictive. We're currently working on a drill template for the cover.
How difficult is this to install?
Overall, this kit is a simple installation. It involves:
-Replacing your stock airbox with the modified one.
-Routing the wired injector connection to the Vortex ECU.
-Inserting the 2nd injector fuel hose T fitting, into the pre-existing fuel line.
For step-by-step instructions, we're now sending a QR code with your 2nd injector kit.
Do you have a manual for installation?
Yes, we do! It's an in-depth installation manual, with step-by-step instructions. We will send a QR code with your 2nd Injector kit for an online PDF.
Shipping
We offer free freight for online orders over $75.00 in the USA (Excluding AK & HI) Online orders only.
For International orders:
All orders will be shipped with an original invoice on the box, which shows the full amount that you paid for the products you have purchased. This will ensure that your package processes through customs with no delays. Some countries have import tax laws, in which case you would be liable to pay import tax on the items you buy from us. Please do your best to educate and familiarize yourself with these policies in your country. You may be responsible for paying these fees once you have received the package.
Returns
We want you to be happy with your XPR products and offer returns on orders 30 days after they are shipped. If for any reason, you're not happy with your purchase contact us.
Frequently Asked Questions
This custom-engineered 2nd injector kit will bring your engine's throttle response and power range to the next level. The stock injector works with this kit to maximize your bike's performance and overall feel. Made from billet aluminum for strength and weight savings. Carefully assembled by hand, into a real genuine Yamaha OEM airbox for long-lasting performance. A Vortex ECU with our custom 2nd injector mapping is required to run our 2nd injector kit! Click here to browse our Yamaha ECU product page.
Please DO NOT attempt to install this kit into a Yamaha YZ450F airbox! This kit was engineered specifically for the Yamaha YZ250F 2024-2025, period! Attempting to use this kit in an unintended application, would be unsafe for the bike and rider!
If you already have a Vortex ECU, you can reflash your current Vortex ECU Here.
We now have a meticulously made, step-by-step installation manual. We will send a QR code with your 2nd injector kit, for an online PDF.
We also recommend Using a Twin Air PowerFlow filter kit, to get the most benefits out of our 2nd injector setup.
We recommend a Twin Air PowerFlow Kit to maximize airflow, along with drilling out your airbox cover. During our dyno testing, we found the YZ250F's airbox cover to be undoubtedly restrictive. We're currently working on a drill template for the cover.
Let customers speak for us
Well made, easy install. Always need more titanium!
These guys and girl rock
Over all the years that I have been riding / racing I have tried many companies and products. As a vet rider / racer I can absolutely say that XPR Motorsports is by far the best place to deal with, their customer service is bar none, the quality of their products is fantastic. I recently purchased a 2nd injector kit with Vortex ECU for my 2025 Yamaha YZ250F and am thoroughly satisfied. Chad and Leah took the time to explain and answer all my questions, I love the fact that they care about their customers satisfaction. I will be a lifetime customer and absoluetly recommend them.
I have done a lot of research on ECUs and how they change the bike. This ECU has brought my bike to life in a way I did not know was possible. It almost feels like a 350 now!! The low-end map in the sand works phenomenally. It’s almost like being able to go up one tooth in the rear sprocket by a map! Then, the all-around best power map made my chassis feel much more compliant, and the power was consistent throughout the throttle range. This ECU helps your bike’s power, suspension, and chassis feel. Trust me. It's worth every penny!
Sent my Vortex to Chad to get some more top end power and over rev out of my CRF250. Absolutely knocked it out of the park in meeting my needs with this bike. A+ and highly recommend! Communication is the best in the industry as well!
Couldn’t be happier with the quality of product. Super easy installation!👍
Our new race bike got the 2nd injector kit and Vortex X10. It truly changed the bikes overall performance and power delivery. We also tested the Vortex on the single injector and it was night and day difference. For those looking to have single injector but more gain then the Vortex X10 is the way to go. Set aside from the kit, customer service was fantastic and had answers to all of our questions. We are very impressed with the results from both XPRs services and quality!!!
Installed the XPR mapped vortex with an FMF full exhaust system. The combination made noticeable improvements. The bike now revs quicker with a slightly better mid-range and much needed improvement to the top-end.
Had to buy it due to the PC system being bigger, and hotter than stock. Super easy to replace. Took less than 10min even with draining and refilling the coolant.
Vortex ecu with xpr maps and cut air box = whole new bike ! Way more torque, more midrange , it will pull 3rd with stock gearing with a stock exhaust , on pump gas I can only imagine what a muffler and race fuel will do , if your not sure to pull the trigger on a vortex from Chad quite thinking and do it !
Bought a vortex and definitely well worth the money! Very satisfied with tunes and overall purchase. Had some questions and Chad is full of knowledge and great with his customers highly highly recommend!
This thing rips now! Excellent customer service and response with any questions I had.