I'm have a 2018 Z900 that I bought in August last year. I have two other bikes( a 15 R3 and 13 Street triple r) that I have had the ECU reflashed and have loved the results so after a bit of research I came across 2 WHEELDYNOWORKS. a vendor sponsored on this forum and decided to take advantage of their services. Here are my impressions and commentary on their customer service.
Their communication and turnaround is absolutely terrific. They received my ECU 2 days ago(Thursday ) and shipped back (express) the same day to me. I recieved it today , a couple days later. The ECU was flashed with consideration to a Two Bros slip on that I have( great sounding exhaust btw). I took the bike for a 30 minute loop of local roads and some highway. Takeaways:
First, throttle response is considerably smoother and more immediate. ( stock it had that off throttle/on throttle abruptness that wasn't terrible but noticeable) and now its very good. power-wise , it feels similar to stock under 6k rpm. once past 6-7k rpm thought it begins it to pull harder than stock and up past 9k to redline it absolutely has a HIT of power that the stock didn't have. I am planning to have the bike dynoed ( and will post results) to see what kind of peak power it makes. my 'butt' dyno says somewhere around 120hp. Compared to stock the bike feels more 'aggressive' in its power band which I like since stock it so smooth and lacks a bit of character compared to other bikes I've owned. If it weren't so freakin cold in New York (Its 30 degrees here) i would have keep riding my Z as it feels like a more exciting ride now.
If you are thinking of doing ECU flash, go ahead. All these new bikes are restricted ( some more than others) to meet emissions and the ECU flash is by far the quickest, most practical and least costly mods you can do to your bike to allow it to run 100%. 2wheeldynoworks does a great job with this service.