Dynojet Research AutoTune Kit for Power Commander V - Wideband O2 Sensor AT-200

I purchased a PC5 1 month ago and debated on whether or not I wanted to go the extra mile by adding the auto tune module. I’m glad I did! Although I was running a generic map from Dynojet’s website on my PC5, I felt that I was riding blind by not know how lean/rich my AF ration was. My bike has a high flow air filter/slip on which increased my airflow a tad, and I thought the PC5 would balance things out a bit. However once I got my ECM flashed and disabled the stock o2 sensor, I finally decided to add the Auto Tune to get additional performance benefits. Once I got everything connected(had to weld a new hole in muffler due to size difference), I went for a 1 hour ride to begin my first session. Within 15 minutes I noticed that my bike rode even better and the throttle response was spot on. I nailed it a few time to get readings in the upper rpm range and let me tell you, my bike pulls so much better since the AF ratio is being targeted to 13.2/13.0. This is the best upgrade that I’ve purchased for my bike so far and it will at least allow me to forego getting my bike dyno tuned. I’m not looking to squeeze out a extra 1-3 HP, but wanted a peace of mind that my engine is running properly and optimally. The best part is that it’s always making small adjustments to keep the AF ratio on target if you were to add more upgrades or change to higher/lower altitudes.In regards to install, if you installed the PC5 the AT is a piece of cake in comparison. The only drawback is the size O2 sensor included in the box, 18mm x 1.5, which is more suited and the common size for those who purchase aftermarket exhausts. My stock o2 sensor size was 12mm x 1.25 so I had to go the extra mile and get a shop to drill and weld a bung to accommodate the AT sensor. It would be nice if Dynojet offer AT with a choice of which size sensor your bike has, opposed to catering to the HD and aftermarket crowd. Other than that I highly recommend this product even if your’e running a completely stock bike, since they are sold running lean to meet emission standards.

This auto tuner rocks, it works exactly as anticipated and is very friendly to use. Instructions could be cleared up more on install and sometimes you may have to restart the bike after initial startup on a ride as the rev limiter will stick as the module is not communicating with the PC5 correctly, after restart of bike, hiccups are gone back to the full power potential your bike has to offer... Overall, dials to the desired target AFR and does a good job making fuel adjustments. Definitely recommend this beast of an upgrade.

I gave it 5 stars because the benefits outweighed the one difficult part. This sensor is big and takes a larger bung (spelling?) Welded on the exhaust if you don't already have one on there. Luckily for me I had a friend who is good at welding, otherwise a shop wanted 200 dollars to weld on this tiny little part. Be careful when you weld it because the exhaust is thin and easially can burn through it if you are not good at welding). Ok besides that troublesome part the autotune sensor works great. I have an aftermarket exhaust and air filter and my bike used to "bounce" at 1000rpm. I bought the power commander and it helped, but the autotune took it to the next level. Smooth acceleration, no more "rpm bouncing" easy to install (besides the welding part). The other complaint is the sensor cable was too short for my bike meaning I couldn't get the sensor to the motorcycle trunk. But they gave me enough power cable to wrap around the bike.... wish they swapped the cable lengths. Still the benefits outweighed the down sides.

This works great but if you have titanium pipes its a bit more work because not many people can weld titanium. Its just multiple factors to make sure its doing its job right. Dynojet didnt know how to get me a titanium bung which was bs because its on their parts list. You cant weld stainless steel to your titanium pipe. I ordered a small titanium piece of bar stock sent it to a machinist i knew in TN to duplicate the SS bung. I was goin to send the Titanium bung an link pipe to NC to get welded but luckily the machinist in TN had it done at his work for free. Check for exhaust leaks ahead of the o2 sensor. Make sure you have block off plates installed. Make sure your o2 senor will fit becuase it sticks out farther than the narrow band.

The photo that is displayed on Amazon for this item is inaccurate and misleading! If they are only selling 1x O2 sensor then dont front like it comes with 2 sensors by displaying a BS picture with 2.

Works as expected with auto tune. This is a must have to see the AFR in real time. You cannot make safe adjustments without it. I welded in the bung as per directions and have had no problems reading.

I'm just glad that I know a guy that works at a high performance shop that came over and installed it for a few brews and some chicken. It took us a few hours to get it up and running, and the software was a bit twitchie and took some time to get just right. Man does it work great once it's properly installed! Just to be clear... My review is for installing the Power Commander V. and the Auto Tune both. I also had to have a hole cut and the kits 02 sensor welded to my pipe because I had already installed a new 2Brothers Exhaust.

This is a must have if you don't live in an area that you have a shop to dyno tune your bike easily. This product works very well. The only reason that I couldn't give it 5 stars is because it would be nice if dynojet could give more size choices for their wide band O2 sensor so that I wouldn't have had to have their O2 sensor bung installed on my pipes.