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TST WORX Spec ECU Tune for Yamaha R3 2015+ / MT-03 2020+

TST WORX Spec ECU Tune for Yamaha R3 2015+ Utilized on our championship winning TST R3 Superbike. Breath new life into your R3 with the TST WORX Spec ECU.

TST WORX Spec ECU Tune for Yamaha R3 2015+ / MT-03 2020+

The TST WORX Spec ECU Tune is the result of hundreds of hours of development, testing, and analyzing. When paired with the right components, this tune can turn an ordinary Yamaha R3 or MT-03 into a WORX certified track weapon.

Want an ECU sent to you instead of shipping yours to our shop for flashing? Select the "OEM ECU Core Charge" option to be sent one of our core ECUs, and if you want a return of the $200 core charge, simply send us your unmodified OEM ECU for a core charge refund. Stock levels vary so we may be temporarily out of the ECU cores specific to your bike, and in that case, it is required to ship your ECU in for flashing. Still not sure about Core Charges? Click HERE to learn more.


Yamaha YZF-R3 | 2015, 2016, 2017, 2018, 2019, 2020
Yamaha MT-03 | 2020

This product is part of our Worx Program!

Learn More!
Weight 0.75 LBS
Price: $250.00
CORE Options
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If buying this product as part of the Buy Together bundle below, define these options there.


  • Changes fueling to take advantage of every bolt-on part included in the TST R3 / MT-03 WORX Pack
  • Increased rev limit of 13,000 RPM
    • 13,000 RPM rev limit has been thoroughly tested and proven to work safely with the stock valvetrain
    • Increasing the redline taps into additional power availability and puts the rider higher into the rpm range for the next gear on each shift, allowing them to be better positioned in the RPM range
  • Eliminates OEM air injection system (AIS)
  • Eliminates factory closed loop O2 system
  • Eliminates fuel injector deceleration cut for easier corner entry and braking
  • Remapped fuel tables for cylinder 1 and 2 separately across multiple throttle openings enable a smooth power delivery
  • Remapped ignition timing helps torque production and throttle response

Premium 91-93 octane fuel is required for expected results and safety against knock.


With an arsenal of Yamaha R3s in the TST stable, our WORX program had one goal: get the most power out of the R3 without sacrificing reliability or rideability. With hundreds of hours and over 1500 dyno runs poured into this project, the resulting WORX Spec Tune is a thing of beauty that is capable of taking your R3 or MT-03 to the next level. We dived deep into the ECU to fully optimize the capabilities of the Yamaha package, enabling you to get more power and improved performance when pairing it with the right components.

This tune was specifically designed to work with the parts included in the TST R3 / MT-03 WORX Pack. Pairing this tune with other parts may not provide expected results.

No OEM ECU Core Charge

Select this option if you want to send us your OEM ECU for us to tune and send back to you. You are responsible for shipping the ECU to us originally, so please be sure to pack it neatly with proper padding. Average turnaround time is 2-3 days, depending on any weather or family emergencies. Please print off your order confirmation and include that with the ECU.

OEM ECU Core Charge

Select this option if you want to receive one of our core ECUs that is already flashed. This option enables you to have two ECUs and minimal downtime for installation. If you don't need your original OEM ECU, you can send it back to us and receive a Core Charge refund of $200. It is your responsibility to properly package and ship the OEM ECU when requesting a core charge refund. Please ensure to include the original packing slip and that the OEM ECU is free of any damage, modifications, or contaminants. Your ECU must not be previously flashed with any technology other than FTECU. To read our full policy on Core Charge Refunds, please see our Terms & Conditions page.

Installation shown as part of the WORX Pack Installation Guide

Q: Do I ship my ECU to you?
A: That is one of the options, yes. When purchasing the WORX ECU Tune, if you select the "No OEM ECU Core Charge" option, it is your responsibility to ship us your Yamaha R3 / MT-03 OEM ECU for tuning. The ECU must be properly packed and free of any damage or contaminants to be tuned properly.

Q: What is a Core Charge
A: We wrote a whole article on what a core charge is. Click HERE to learn more.

Q: Why is this tuned for specific parts?
A: We build this tune to optimize our WORX Part Package. When pairing this tune with all of the components in that package, you can make powerful performance gains!

Q: Do I pay for shipping if I am sending you my ECU?
A: Yes - it is your responsibility to properly package your ECU and send it to our facility in Florida. Whether you are sending you ECU in to be tuned or sending it in for a Core Charge refund, you are responsible for the shipping.

Q: I'm located outside of the United States. Will I have to pay duties on this item?
A: Some countries charge additional fees when a package is imported and delivered to the recipient. We have no way of knowing or estimating what these fees will be. It is the buyer's responsibility to cover these additional costs.

Q: What is your return and warranty policy?
A: Returns are not accepted for this item. Please read over our policies thoroughly on our terms and conditions page BEFORE making your purchase.
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