Attention: You are purchasing closed course competition Product(s)

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.

If an ECU tune was purchased, please send your unmodified and undamaged OEM ECU to TST Industries, located at 1307 Saratoga St, DeLand, FL 32724.

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FREE SHIPPING OPTION FOR DOMESTIC ORDERS:

U.S. customers are offered a free shipping option for orders with a discounted subtotal greater than $250.00 (before taxes applied). The order's shipment destination must reside within the United States of America. The free shipping options still utilize our standard postage providers and 3rd party shipping companies. Does not apply to large items such as exhausts, stands, and bodywork shipping. All terms and conditions that apply to normal orders will continue to apply to orders with a free shipping option.

NO RESTOCKING FEES:

An item returned within 30 days of purchase, that includes an accurate RMA#, in a perfectly new, unopened condition, and that complies with our other return policies, will not be charged a restocking fee.

MOST QUESTIONS ABOUT THIS PRODUCT CAN BE ANSWERED ON THIS PAGE.

The most common product related questions are answered in the tabs section on this page. Be sure to carefully read through the "Product Details", "In the Box", and "FAQs" tabs. In addition, a lot of our products have comprehensive videos demonstrating installations and product features. You can find those videos in the "Videos" tab.

Note: Some product pages may not have all the tabs mentioned above. Please read through all the available tabs to find the answers to your questions. If you still need assistance, please use the "ASK A QUESTION ABOUT THIS PRODUCT" button below the tabs section.
NO ADDITIONAL COST: You pay at the time of checkout and never have to worry again.
COVERAGE: Our Limited Extended Warranty starts on the date of purchase. It covers all manufacturer defects for our TST Exclusive products. (Products manufactured by us with the exception of our WORX products)
EXPERT HELP: As always our team is here to help. If you’re unsure about this warranty or if your product is eligible, feel free to reach out to us and we can help answer any questions you may have!
PRODUCT ELIGIBILITY: TST will offer our Limited Extended Warranty on all products manufactured by TST Industries.
EASY CLAIMS PROCESS: Simply click the “Contact Us” page and fill out the “Returns Form” to begin the warranty process. Once our team receives your email and initiates the RMA, you can send your product back to us and we will repair/replace the product at no cost as long as a manufacturer defect is found. What qualifies as a manufacturer defect? Check out our Terms and Conditions for some examples!

TST WORX Performance ECU Tune for Suzuki DR-Z4S / DR-Z4SM 2025+

  • TST WORX Performance ECU Tune for Suzuki DR-Z4S / DR-Z4SM 2025+
  • Get your Suzuki DR-Z4S / DR-Z4SM ECU tuned by TST Industries and experience the difference.
  • Unlock massive power gains with the TST Industries WORX Performance ECU Tune.

TST WORX Performance ECU Tune for Suzuki DR-Z4S / DR-Z4SM 2025+

TST WORX Performance ECU Tune for Suzuki DR-Z4S / DR-Z4SM 2025+

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!

Learn More!
SKU TUNE-3100=1
2025 +/DR-Z4SM/Suzuki
TST WORX Performance ECU Tune for Suzuki DR-Z4S / DR-Z4SM 2025+
 
Price: $250.00
What exhaust system is installed on your motorcycle?
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ATTENTION:

If buying this product as part of the Buy Together bundle below, define these options there.

CLOSED COURSE APPLICATIONS ONLY
This kit was designed and intended for closed course competition use ONLY. These products are neither designed nor intended for use on public roads or land and it is against Federal and State regulations to do so.

Features

  • Developed for bikes with an aftermarket full system exhaust
  • Optimizes fueling maps
  • Advances ignition timing to improve power at the top end
  • ETV is unrestricted at top end in Mode 1
  • Disables decel fuel cut
  • Disables front wheel speed fault code
  • Disables EVAP fault codes
  • Disables PAIR FI code
  • Disables O2 Sensor FI code
  • Over 16% increase in power and torque in the top end compared to stock
  • 9% increase in peak power and torque compared to stock
  • Over 11% increase in power and torque compared to a full system exhaust and stock tune
  • 4% increase in peak power and torque when compared to just a full system exhaust and stock tune
  • OEM air filter and high-flow aftermarket filter compatible

Description

After 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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