YAMAHA XSR900 ECU FLASHED INSTALL

Many people do this backwards and start at the front of the bike which can give you alignment issues. Once the exhaust was loosely on the bike, I moved from the back of the bike forward to tighten all the bolts. I used dabs of grease to hold the exhaust gaskets in place when mounting the header tubes. I used new exhaust gaskets but think you would be fine reusing the stock ones as they are very thick. I like the black anodized thick header flanges. The header comes as one piece and was easy to install. I also loosened the bottom radiator bracket bolt so the bracket could move around which eased install. I removed the top radiator mounting bolts which allowed me to slide the radiator off the bottom mount.

YAMAHA XSR900 ECU FLASHED INSTALL

Install took me an hour and 30 minutes from start to finish. The o2 bung accepts both narrow and wide band o2 sensors with an included insert. I have not experienced this in my normal street riding, even with scrubbing the sides of the tire to the edge. This is why my customer ordered a new exhaust. There have been reports of people who aggressively corner touching down the canister. Once mounted it is solid with excellent fit to the bike and to the different pieces on the system. I found the system straight forward to install even though it is a little different than the others I have tested and added a few minutes to the install time. The instructions are online and easy to follow. The extender has now been added to the parts list. It's a shame, as the finish from the coating on the pipes looks excellent and otherwise the exhaust is very good. They are not clean and there are some large blobs. I have heard there are some improvements on newer examples, but it is impossible to ignore the welds on this example. The system I have here is an early production piece. Thank you to the awesome customer that ordered a new exhaust and sent the Yoshimura to me!!

I have completed testing and tuning with the Yoshimura full exhaust system on the 2021 Mt09 and am very happy with the results.

Yamaha XSR900 ECU flashed