I acknowledge that the product(s) being purchased () was/were designed and intended for closed course competition use only. The product(s) is/are neither designed nor intended for use on public roads or land and is against Federal and State regulations to do so. By proceeding with this purchase, I , agree to only use the product(s) for closed course competition.
Adding an aftermarket full system exhaust to your Suzuki DR-Z4SM / DR-Z4S is a huge upgrade in both performance and sound, but dialing in the fueling is critical to keep your bike running smoothly while also adding another huge performance boost that the exhaust alone couldn't deliver. That's why we strapped our DR-Z4SM equipped with the Yoshimura RS-12 Full System Exhaust to our in-house dyno and got to work, and the results speak for themselves!
Applications:
Suzuki DRZ400S / DRZ400SM | 2025, 2026 (North American models ONLY)
We cannot accept ECUs outside of the North American market at this time.
You are responsible for sending us an undamaged stock Suzuki DR-Z4S / DR-Z4SM ECU. We will reflash the ECU and send it back to you ready to be reinstalled. Once an ECU is flashed, all sales are final and no refunds can be issued.
TST ECU Tunes are shipped after we receive and flash your ECU. Any other items in the same order will ship separately on our normal schedule.
This product is part of our Worx Program!
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CLOSED COURSE APPLICATIONS ONLY
Features
DescriptionAfter the long awaited Suzuki DR-Z4 update, we knew that our WORX Program could make it even better, and it certainly did! After some time on our in-house dyno, we developed an ECU tune that not only optimizes your Suzuki for your aftermarket full system exhaust, but it also unleashes additional performance across the entire rev range, especially above 7500 RPM. Compared to the stock setup, you can expect as much as 9% increase in peak power, and over 16% increase in the top end before the rev limiter. That's an additional 4% in peak power and over 11% increase in the top end when compared to the exhaust alone. Don't leave easy power gains on the table, get your ECU flashed and experience the difference that the TST WORX Performance ECU Tune unlocks. This ECU reflash was tuned using premium 93 octane pump gasoline. 93 octane should always be used when operating with this tune. This tune was developed using the Yoshimurs RS-12 Full System Exhaust with the baffle installed, and is only intended to be paired with the RS-12 or similar flowing exhaust systems. NORTH AMERICAN MARKET ONLY: Please keep in mind that this is only available for North American market Suzuki DR-Z4S / DR-Z4SM motorcycles ONLY. All orders placed outside of the North American region will be canceled. Q: Is a full system exhaust required for the tune to work?
A: Yes - This tune was developed with the Yoshimura RS-12 full system exhaust and it must be paired with the RS-12, or similar, full system exhaust to achieve expected results. Failure to do so can compromise engine reliability and performance. Q: Do I ship my ECU to you? A: Yes, it is your responsibility to ship an undamaged Suzuki GSX-8S / GSX-8R stock ECU to our facility in Florida for tuning. The ECU must be properly packed and free of any damage or contaminants to be tuned properly. Q: Where do I ship my ECU? A: 1307 Saratoga St. Deland, FL, 32724 - Please include your order number. 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. 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. TST Industries Terms and Conditions |
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