E85 Tuning 2020+ BMW S1000RR / R / XR / M1000RR Upgrade




Product Description



WHAT IS E85 Tuning?

E85 is the ability to fill your 2020+ BMW M1000RR / S1000RR with either pump gas (91/93 octane or E85). Fill your tank with either fuel and you will have our mapping optimize performance for that E85 and still be able to ride on pump gas. With the ability to blend ethanol 30% in either direction, you can have the ability to run fuel from varying stations without worrying about the content you are pumping. You can run E0 (zero) to E30 on your pump map and E35 to E85 on your ethanol map and the bike will adjust for each accordingly.


  • E85 makes more power than pump gas but a little less than VP with the main benefits being easily accessible, cleaner running and less messy/needy than MR12, all while being available at many local gas stations.
  • It’s cheap! VP costs about $160 USD for 5 gallons, E85 is about $2 USD per gallon (depending on your location).
  • E85 will not foul your spark plugs like a leaded race fuel does after long term usage.
  • E85 will not harm your catalytic converter or O2 sensors like a leaded race fuel will after long-term usage.


Our Stage 2 performance upgrades utilize the factory wideband sensors to adjust fuel trims. FTCL (full-time closed loop) means your motorcycle already has a fuel map that it will use when you’re riding AND has a lambda target it’s constantly adjusting to hit. When you change fuels from pump gas to E85, the bike will require more fuel (about 30% more with E85). Our FTCL calibration will see the bike needs more fuel and adjust to hit a safe target. The M1000RR / S1000RR already does this from the factory but only for a small percent of time during cruising (not WOT) and only for pump gas. We adjust the software to make sure the closed loop system is on at all times and specifically adjust for Ethanol under certain conditions and variables.


Because E85 requires FTCL. Before purchase you’ll need to have our 2020+ S1000RR Stage 2 (M1000RR Stage 1) mapping. No hardware is required! Just a software update. We have rigorously tested this mapping since mid-2019 on our own shop bikes and a select few customer bikes. This mapping has been successfully tested in 210+MPH drag racing, roll racing, casual riding, and on circuit track racing.. and the owners love it. We have nothing but great things to say about this mapping and all of our beta testers strongly agree.


E85 mapping price is for a single map only and it may take a few revisions to get perfect. If you go to the dealer and get a software update, we have to start again from square one. We suggest you have your motorcycle’s software updated before purchase of this map and DO NOT UPDATE YOUR MAPPING AFTER. This way you won’t have to buy this a second time and start over.

Dyno Testing

2020 S1000RR

RED = 205whp / 88wtq (93 octane pump gas, full bolt-ons, Stage 2 mapping)
BLUE = 208whp / 90wtq (E30 MIXED E85 pump gas 30%, full bolt-ons, Stage 2 mapping)
GREEN = 213whp / 92wtq (Straight E85 pump gas 100%, full bolt-ons, Stage 2 mapping)

You can see the E85 dyno making fuel from the mid-range all the way to the limiter over pump gas.


2021 M1000RR


Green = Stage 1 with E85 Pump Fuel – 208whp / 90wtq
Blue = Stage 1 with 93 Pump Gas – 199whp / 87wtq
Red = Baseline with 93 Pump Gas – 191whp / 85wtq

Keep in mind this is a FACTORY STOCK M1000RR. NO MODS other than the flash have been added to this bike. With the usual bolt-ons this number will go up and up. With a completely stock bike and factory exhaust we made 208whp with E85 pump gas. That’s almost 20whp and 5wtq over stock with nothing but a flash.

**Pump gas testing performed with optimal dyno conditions utilizing 93 octane pump, E30 mixed ethanol, and E85 ethanol gas. Usage of a lower octane will yield lower overall power.**

**Expect similar % of gains in XR and R platforms as they share basically the same engine as the RR with less overall power**


Consider the following before your purchase

  • E85 isn’t available everywhere. If you’re not sure if you have E85 locally, CHECK THIS WEBSITE.
  • E85 burns 30% more fuel than pump gas. Keep this in mind when going for a ride as your gas mileage will be 30% less than pump gas.
  • Cold starts in 40 degrees Fahrenheit or colder may be harder for the engine to turn over (not harmful and once started and warm it is fine).
  • Common sense, but we recommend you do not let E85 sit in your tank with no use for long periods, (more than one month) as the fuel doesn’t last as long as regular pump gas. Alcohol based fuels, like leaded fuels, can dry rubber and seals and stick injectors tips if left sitting for months on end with no use, do not let a bike sit with ethanol or race gas in it for a period of time.
  • Only fill your tank with E85 or pump gas when the gas light comes on. Mixing half and half will provide lower performance.
  • Make sure your local E85 gas station has good ethanol content (some stations have lower quality E85). Ethanol can vary (between 50-85%). We recommend you test yours before purchase. TEST KIT.
  • Lower ethanol content in your E85 means less performance.
  • After switching fuels we recommend you gently ride your bike for about 5 minutes while your motorcycle adjusts to new fuel.
  • Keep in mind if using our Flex Fuel mapping and happen to fill with a full tank of normal pump gas, there may be a very rich fuel mixture, if you use pump gas that has very low or zero ethanol content.
  • Mapping is designed to work for 30-40% swings in ethanol. Our standard pump file will work on 91/93/VP and ethanol blends to E30, our ethanol map will work on ethanol blends from E35 to E85.
  • Make sure your software updates and caliper recall has been done BEFORE this upgrade, as every file requires time to make and get 100% right from customer to customer.



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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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