Hi all,
I have a Performance line CX Gen4 that I got the error 504 on after riding about 70Km (it had a badass 4 fitted), and it took 90 minutes/30 Km to get rid of the error.
This weekend, I fitted a speedbox 3.0, all good so far (as epxected), 30Km done.
I do at least 160Km/week, so if in 2...