The Rottweiler Performance 'Fueling Dongles' are an effective and simple method to improving the fueling mixture of any fuel injected KTM by allowing the stock ECU to deliver a proper mixture at low to mid RPMs. By replacing the stock narrow band O2 plugs with these simple to install dongles, the Rottweiler Fueling Dongles feed the stock ECU a pre set signal that substantially smooths out the lower end power delivery reducing the jerky transition between the extremely lean low RPM mapping and the open loop upper end mapping. Overall average air fuel ratios also tend to richen up by about .5 to 1 point as well allowing the user an inexpensive option to 'bump up' the richness of their fuel delivery if the cost of a Powercommander is not currently an option for them.
How do they work? It's actually quite simple. The stock ECU is set to lean out the fuel delivery to a very lean 14.7 air fuel ratio (AFR) under 5500 RPM and 20% throttle. Once the engine has reached a sufficient warm up the ECU 'listens' to the stock narrow band O2 sensors and looks for a particular signal to keep the bike in that lean condition. This causes heat issues from extremely hot header pipes, makes the motorcycle jerky at low RPMs and reduces power. The Rottweiler Fueling Dongles send a return signal to the stock ECU that keeps the low end fueling at a much better running 13.8 +/-. A mixture that translates into an overall better running motorcycle.
Note: When running our Rottweiler Fueling Dongles, you have the option to remove your stock O2 sensor from the exhaust header. You may add one below in options.
Showing reviews 1-40 of 63 | Next
Posted by Phil on 18th Feb 2021
I was amazed that such a small, inexpensive & easy to install upgrade could do that much to the low end performance. I couldn't be happier with the fueling dongle. I installed this on a 2021 690 Enduro R
Posted by Ben on 28th Jan 2021
Easy install. Works great! Much better low end
Posted by Unknown on 24th Jan 2021
Great product, quick shipping to North Alabama.
Suggestion - maybe add the option for a small pack of anti-seize for the O2 Plug threads.
Posted by Whitelaw on 18th Jan 2021
Firstly my parcel arrived way quicker than expected. Less than a week from California to Australia.
I have a Vitpilen 701, and it is quite a poor bike in low revs.
I bought one for my bike and a mates. Both of us agree that this made it into a different bike. I am just about to put another order in for more parts (SAS/Canister removal).
Posted by Unknown on 27th Nov 2020
2020 KTM 690 SMC-R: At Low speeds cruising the bike's throttle response was not smooth or responsive.
Now with the fueling dongle the bike is now very responsive and very smooth at both all levels of the throttle. Most of all....the bike is not running HOT anymore around town and transitions from cruising to High Speeds are just the Blast I love.
Posted by Clay on 25th Nov 2020
I’ve swapped my 2018 701 Enduro over to a Supermoto and just wasn’t happy with the gearing. Now with this easy to install “dongle” I’m getting the power curve I feel I was getting with the larger rear tire and sprocket setup on the enduro. For me I’m feeling the difference in the low to midrange area. This should be the first mod to any 701, all of the upgrades I’ve gotten from Rottweiler have been top notch....more to come.
Stop putting more miles on your bike without this!
Posted by Carson Willett on 4th Nov 2020
This is absolutely the first thing you should buy for your 690/701. I am absolutely blown away but this super simple product. After reading the reviews I was sure it would do something but not have such a profound difference in midrange power. Right where you expect the bike to bog down like it would stock, it just pulls itself back into that sweet sweet power band and flys. An absolutely must, especially if you live and ride in the mountains with steep inclined corners, this is what you need. This could be $70 dollars more and I would still think it’s an amazing value. Get this NOW!
Posted by fred s on 25th Oct 2020
Bike stock low rpm is rather rough ,installed dingle and made noticeable difference in smoothness, DO IT !
Posted by Unknown on 19th Oct 2020
The fueling dongle made itself known as soon as I started the bike as the idle was noticeable improved. The low speed throttle response was much smoother, the surging and bucking were replaced by clean fueling response which allows easier modulation. This is an excellent product at a low price. Thanks Rottweiler !!!
Posted by Jesse on 17th Oct 2020
After installing dongle, the bike doesn’t sputter when revs are lower, and you crack on the throttle.
Also installed a 16 tooth countershaft sprocket at the same time and the lugging you felt when going slow is gone.
Posted by Jeff on 28th Sep 2020
I used to had my check engine light on with O2 sensor problem. It may caused by the booster plug. It took me about 5 mins to install and the check engine light is gone! Very smooth acceleration and it’s a must buy item!
Posted by Unknown on 15th Sep 2020
This fuel dongle is the best mod for the money
It does exactly what it should, smooths the bike in low revs so you get much better control
plus it takes 5 min to install
Posted by RW on 1st Sep 2020
The easiest mod I've installed. I do notice a difference in the low end response. My bike seems to have better throttle response off the bottom. For the price I would recommend this dongle if you can't afford the PC5.
Posted by Bill B on 26th Aug 2020
Installed the fuel dongle and removed the O2 exhaust sensor on my KTM 690 SMC/R. Installation was simple and took approximately 15 minutes. The low speed fueling does seem smoother and surprisingly my fuel mileage improved slightly on my first tank after installation. It's absolutely worth the $40 investment.
Posted by Ronald Richard on 20th Aug 2020
Fuel dongle works perfectly, no more lean surge, worked on my Superduke and now on my 500 EXC-F. Easy install.
Posted by Victor Haupt on 17th Aug 2020
Fitted in 1 minute...honestly feel awesome. Way smoother...maybe I am dreaming but feels way more powerful.
Posted by MJ on 4th Aug 2020
Honestly, I don't know if I could tell you there is a major difference in anything other than it seems to have a smoother idle when cold. Either way the specs are on paper and for $30, that's good enough for me.
Posted by George B on 9th Jul 2020
Works exactly as advertised, smooths out that low rpm jerkiness and the bike seems to run a little cooler. Very easy to fit, takes maybe 10 minutes. Recommended.
Posted by Unknown on 26th Jun 2020
Easy install with good results. Definitely an improvement but nothing drastic. For the price I recommend it.
Posted by Tom Erik on 22nd Jun 2020
Very easy to install, and was an instant improvement. Just wish I did this sooner, I am at 10000km with the bike now.
This should be the first mod you do.
Posted by todd on 20th Jun 2020
My 2018 690 Duke was a bit rough at low RPM (lugging the engine). Most of this is due to the large single power pulses and small/light flywheel. Some of it is due to a lean fuel/air mixture (not enough fuel to burn properly) at low RPM while the engine is warm. This dongle smoothed some of the jerkiness out due to the lean condition. However, the jerkiness that is associated with the power pulses and light flywheel remain - as expected. This is a simple to install, inexpensive mod that will give you a little more power range down low. If you want to smooth the engine even further, find a heavier flywheel.
Posted by Aidan on 8th Jun 2020
To be honest I want expecting much out of something that claims to work so well and be so cheep, but I was wrong. This took all of 5 minuets to install and then did the 15 minute idle reset just to be safe and then boom. It's a completely new bike runs so much smoother increased throttle response, i'm more then happy with this product and would highly recommend to anyone!
Posted by Freaky Deacon on 25th May 2020
Very easy install and solved a problem that has plagued we for a while. My bike stalls at the most inconvenient time like a water crossing so I got the dongle and so far it's all good.
Posted by Jon K. on 28th Apr 2020
Bike runs super smooth now, especially at low RPM, it no longer chugs like a tractor. Best value for the money.
Posted by James Painter on 24th Apr 2020
It helps smooth out the low RPM throttle, where the factory map is the worst. No it doesn't do everything a PCV does, but its a cheap effective alternate. Noticable improvement in my 701 E with this dongle and a Wings exhaust
Posted by Dave Reid on 29th Feb 2020
This thing is miraculous. Took all of 3 minutes to install and the results were instantaneous. Smooths our the low end at take off with no more stumbling or jerkiness. I was a little skeptical but after reading reviews all over the KTM forums I said what the heck. All I can say is that at less than 30 bucks this is the FIRST thing you should purchase. I am very happy with the Fuel Dongle and definitely recommend it to any KTM 690 owner.
Posted by Unknown on 10th Jan 2020
It took me 10 minutes to install. Works like a charm.
Posted by Dario on 26th Dec 2019
I've put this in a 2019 Svartpilen 701 that I just got, and it works phenomenally. The bike in stock form is unusable in the 2-5k RPM range. This dongle helps a lot, making any RPM +3k actually useful.
If you've just got this bike, this is the first thing you should do to it.
Posted by J. Sellers on 28th Nov 2019
With 13,000 miles on my ‘17 KTM 690 Enduro R the O2 sensor went bad. I finally decided to get the fuel dongle and plug and it made it so much smoother transitioning off idle. Now those slow sections of single track are much easier. Cheap, easy performance upgrade. DON’T WAIT!
Posted by BRIAN on 14th Nov 2019
Reasonably priced, easy to install, makes the bike run smoother, Definitely would recommend.
Posted by Dave Rains on 18th Oct 2019
Wasn’t sure this dongle would do anything, as the price was really cheap. Boy was I wrong. My 2019 KTM 690 R displayed all the regular too lean problems associated with this model, jerky off the bottom, gurgling at very low speed in traffic. Figured what the hell, will give the Rottweiler Fuel Dongle a shot. Runs great now! No more popping on deceleration either. This thing works! Will require 5 minutes of your time to install. I highly recommend it
Dave in El Paso.
Posted by firstname.lastname@example.org on 6th Oct 2019
Took longer to get the cover off my bike then to actually install.
Bike runs a lot better and way les jerky now. Great buy for the 701 Husky or 690 KTM
Posted by Gary Mccurrach on 4th Oct 2019
After running up 1500kms on stock 2019 690 Enduro R I found the lower rev range to be a tad erratic
Installed the Fueling Dongle along with the Canister Removal Kit and found a real difference to the smoothness = no more surge and a better balance
Posted by Paul on 27th Sep 2019
Delivery was prompt and installation to less than 5 minutes including tidying up the stock wiring. My 690 Euro R was transformed!! It would buck, surge and generally protest anything less than WOT from 3,000 to 4,000 rpm and roll on was weak. It now pulls hard from 2,000 all the way up at part throttle, and cruises smoothly between 3 and 4 thousand! Remarkable!
Posted by Scott on 26th Sep 2019
Works as advertised. But the check engine light came on from the get go on my 2018 701???? Hope it goes out soon. Postage to Australia is expensive.
Posted by Levi Lloyd on 16th Sep 2019
I will say that when I opened the package I was a bit sceptical that this little piece of plastic was going to do anything. Happy to say it worked exactly as described. The throttle response is much cleaner at low RPMs and the jerky feeling is completely gone. Worth every penny!
Posted by Unknown on 28th Aug 2019
Noticeable improvement at low rpm makes the 690 Duke more tractable.
Posted by Joe Doty on 26th Aug 2019
I purchased a brand new 2019 KTM 690 SMCR late this summer. Within the first weekend riding I noticed unprovoked stalling, and what felt like the need of excessive throttle just to take off from a light. I read up on this fuel dongle and figured, for the price I couldnt argue with th gamble. It took me all of 30 seconds to install it, and not only did it instantly fix my stalling issues. But it smoothed out the bottom end and my throttle felt just a little crisper. No more stalling, and the bottom end feels so much nicer when taking off from a dead stop. Totally worth getting even for a bone stock bike.
Posted by Unknown on 26th Aug 2019
Noticeably smoother in lower revs. Easy to install. Worth it for the cost.
Posted by michael kilawee on 19th Aug 2019
The fueling dongle did exactly what it was supposed to do.
The low end on my 2018 KTM 690 Duke is silky-smooth now, and runs perfectly through the entire RPM range.
It’s now possible to ride highways at 65 MPH in 6th gear without feeling like my teeth are going to fall out.
The folks at Rottweiler are a pleasure to deal with. You can tell they’re true enthusiasts, in addition to being great at the business they’re running.
I look forward to making more purchases from them!
Showing reviews 1-40 of 63 | Next