2021 Kawasaki ZX-10R Stage 2 Feature Add-On



I understand that BT Moto will get fueling as close to my spec as they can and err on the safe side. Changes may need to be made on the customer side to optimize fueling. This will need to be done via a piggy back fuel module. (Required)


I Have Verified My ECU Part Number is Supported (in description) (Required)

SKU: BTM-2021-ZX10R-FLSH-2.

Product Description




The 2021 ZX-10R / RR is one of the most requested products we’ve had this year. Customers are very excited to see this bike unlocked. Being the first to unlock the 2021 is never enough for us. We want to make sure that people are not only satisfied with our flashes, we want them to be amazed with the results. After taking some time to develop our mapping, we think we have something everyone will be happy with.



  • Faster Quick Shifter (Race Tools)
  • Race Features Available For Track Use
  • RPM and Throttle-Based Fixes
  • Fueling Cut
  • Immo Off
  • “M” Mode Based Race Fuel and Ignition Maps in medium power mode
  • More power found through Optimized Injector Balancing
  • “Ram Air” Map Changes


  • FUELING –  With custom tuning we can target better AFR (air/fuel ratio) plots to enhance not only racing performance, but also cruising and partial throttle inputs.
  • IGNITION – Optimized to make the most power while still being safe and reliable.
  • THROTTLE DERESTRICTION – Giving you the ability to utilize 100% of the throttle is paramount in track situations where you need all the power you can get on demand. The factory file has a “dead spot” on the top end that kills the bikes power curve when it should be making the most. This also means any kind of straight line acceleration also suffers. We remove these factory restrictions to ensure a smooth and predictable throttle, all the way to redline.
  • QUICK SHIFTER – We all know how slow the QS is stock. Our flash provides 50% shorter quick shifter up and down. Our tuning reduces “kill” times to make the quick shifter much faster than stock, and a better overall riding experience.
  • LOWER FAN-ON TEMP – Let’s face it, this bike rides a little on the hot side. To help not only the riders enjoyment but also keep the engine slightly cooler, we’ve lowered the fan-on temps.
  • INCREASED RPM LIMITER (at customer request) – The stock RPM limiter is set to 13,800 RPM. We have been testing 14,400 RPM with zero negative side effects. We set the RPM limiter for 14,400 RPM in all gears. This helps you stay in the powerband longer and reduces the need to shift at the track.
  • INCREASED TOP SPEED LIMITER – Removed so you can let the bike run free in any track environment.
  • TRACTION CONTROL SWITCH – This one is really just an annoyance that we took care of after riding the bike. We noticed you couldn’t switch the traction control system off while riding the bike. With our flash you now can.
  • EXHAUST VALVE MANAGEMENT – Improved and optimized for peak performance and sound.
  • RACE FEATURES – Minor features unlocked for the purpose of track use.
  • FUEL CUT – Optimized for better limiter feel
  • IMMO OFF – Immobilizer off
  • MODE BASED MAPPING – High power mode will be a pump gas map and medium power mode will have changed ignition and fuel mapping for racing fuel.
  • INJECTOR BALANCING – More power found through injector balancing and throttle based fixes.
  • RAM AIR – Changes to ram air mapping to maximize power and rideability.


  • YOUR BIKE MUST HAVE ONE OF THESE ECU NUMBERS: (21175-1647, 21175-1662, 21175-1684, 21175-1643, 21175-1724, 21175-1650, 21175-1652, 21175-1655, 21175-1653, 21175-1646 and Race ECU).
  • If your bike has a different ECU number EMAIL US BEFORE PURCHASE. Your ECU number can be found on the ECU itself in the tail of the bike. We found the ECU numbers listed cover almost all 2021 ZX-10R’s. We will be working to add more and will update this page when we do.
  • Due to the sensitive nature of the ZX-10R’s AFR (air/fuel ratio) and the platforms almost endless aftermarket options, the file we deliver you may need the fueling to be adjusted to meet your bikes individual needs. In this instance we recommend a piggyback fuel controller and dyno time, or an “auto-tuner” that can aid you in correcting your fuel maps (if needed).
  • Our tuning only applies to Sport and Medium power modes. Please note that all other modes will run like stock and will not be derestricted. We have done this at the request of the community in general.
  • Stage 2 should be ran on 93 octane pump gas or better to achieve best results



Our Stage 2 Flash goes a step further and allows the ZX10 to show its full capability. You can see an power added over the entire powerband that can easily be felt at the track.

This ZX10 came in with Akrapovic and a filter. All testing done with same mods and all testing performed on 93 pump gas, same day.

BT Moto Stage 1 – 193whp / 84wtq
BT Moto Stage 2 – 201whp / 87wtq

ZX10_Stage 2

This is another ZX10 different than above. All testing done with same mods and same day. MR12 mapping is available in medium power mode with our flash.

Factory Tuning with 93 Pump Gas- 165whp / 76wtq
BT Moto Flashed with 93 Pump Gas – 198whp / 84wtq
BT Moto Flashed with MR12 Fuel – 208whp / 88wtq

MR12 ZX10R



Thoroughly tested by our own engineers, not just for its function but also durability.  We purposefully dropped this thing about 100 times just to make sure if you accidentally dropped it, it would still be a usable device.

So why buy it when you can just send in your ECU for flashing and spend less? Let’s see the breakdown.

NO DOWNTIME – No need to send in your ECU or remove it from your bike at all.  You order the handheld, it get’s delivered to you, you flash your bike.  You never miss a day of riding and no effort removing the ECU.

STORE MULTIPLE MAPS – When you send in your ECU, you only get one map.  You might be thinking, “why would I need more than one map?”.  Storing multiple maps means you’re able to flash for different fuels.  If you’re a serious track competitor, we can work with you to get you different mapping for different tracks.  If, for example, you’re add an exhaust to your stock bike, we can email you a file that takes the new exhaust into account with the changes you need to optimize your bike’s new modifications.

GO BACK TO STOCK ANYTIME – Not only can you store multiple race maps, you can also flash the original, stock file back into the bike at any time and for any reason.



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  • “ Bike is running awesome and no out of the ordinary popping under load during downshifts at high rpm. My hats off to your team for making me feel like I have a personal tuner at my disposal. Really appreciate the quick turnaround to get me straight. I can definitely feel the extra power! ”

    Andy Young - Maryland Aug 28, 2018
  • “ This product is amazing.  I feel like I have a better version of my bike.  Like it should have come this way.  The throttle smoothness and even power band make it a joy to ride.  I no longer feel as if I'm riding a wild bronco lol. Thank you again, I didn't think that a L-twin could behave this well.  Also, your customer service is the best.  I could always reach you by email or phone.  I will tell everyone I know about this fantastic addition.  Keep up the great work, guys! ”

    Dan Martinez May 01, 2017
  • “ I have a 2015 S1000RR and was extremely skeptical when I heard about BT Moto and the power they got out of an ECU flash.  After speaking with the team at BrenTuning, all my hesitations were put to rest and I haven't stop winning first place trophies since! BELIEVE THE HYPE! ”

    Troy Gleason - California Jul 10, 2016
  • “ Bren and his team did an awesome job on my bmw s1000rr. Went from 179rwhp an 83 rwtq to 206 rwhp and 93rwtq. Customer service was great and I highly recommend them for any of y'all that want to make that power!! ”

    Paul Jackson - Texas Jul 10, 2016
  • “ Purchased the tune for my 2015 BMW S1000RR. Was skeptical at first and initially had a bunch of questions. Chris was very patient with me and answered them all. Had some problems after receiving my ecu back and Chris was very helpful in getting all my issues worked out. Bike runs fantastic. Definitely worth it. Thank you again guys for dealing with my questions and taking care of everything before and after the purchase. Fantastic customer service. ”

    Cody Hunsucker - Tennessee Jul 10, 2016
  • “ After doing some research it was obvious that BT Moto was the best option for tuning of my S1000RR. I wont go into details but after multiple overnighting of parts to me at no additional charge, I'm really impressed and satisfied with the end result and I haven't even tried out my race fuel tune yet! To top if off I received a random care package of goodies from Chris today. The customer service at BT Moto is probably the best I've received from any business I've dealt with. Their email response times are unreal as well, lol. Literally sometimes instantly, kinda weird. lol. I would recommend any and everyone to BT Moto for your S1000RR tuning solution. If anyone has any questions or are hesitant before purchasing, feel free to shoot me a message and I'll help / assist / give you a more detailed opinion on my experience as well. ”

    Trey Hull - Texas Jul 10, 2016
  • “ I have the Bren Tuning ECU flash on my 2015 BMW S1000RR and it is unbelievable how fast this bike is. This tune is the best thing I got for my bikes. I have also did the Bren Tune for my 2014 BMW S1000r for which it just made this bike really nice. Bren Tuning is the best. ”

    Darnell Edwards - Maryland Jul 10, 2016
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