So lets sum up the situation:I wanted to pass along a major issue I ran into with sending off my ECU on my 2018 XSR900 to get flashed. Purchased the M4 exhaust/ECU flash combo from 2 wheel dyno works and sent off my ECU while I installed the exhaust. When I got it back, it would crank, fire up for a couple seconds with a very weird sounding firing order, then die. After troubleshooting, I was told to return the ECU to them. They then sent me an email stating that I have a new generation of ECU from Yamaha ending with a -70 that the Flash Tune software has a huge glitch with. The ECU is locked and they have no option but to order a new factory ECU for me from Japan which may arrive sometime in June.
I want to be clear that I am not blaming 2 wheel dynoworks as I have no evidence they did anything wrong, and they are doing what they can to help me out. I am just passing this along because if I well established tuner like them ran into this, there could be other tuners that have the same issue. Be aware if you are sending that serial of ECU out. I only have the info that they passed along to me.
They stated that Flashtune does not have a fix, so I will unfortunately be running a factory tune with my exhaust for who knows how long which sucks.
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Your bike ran fine and you sent your ECU to be flashed by 2WD. They flashed it and sent it back. Now bike doesn't run. You sent the ECU back to them and then they realize it's a -70 ECU and is locked.
Had they done due diligence they would have realized this prior to flashing it the first time and sent it back in stock form telling you they can't flash it.
So they realized THEY bricked it and at least are willing to replace the ECU for you. I give them credit for that, but they shouldn't have run into that problem in the fist place. My .02