guess I am confused, why does this commissioning need to be done?
The motor does NOT run from DC, but from
PWM. The motor can get out of sync form the pulses as the motor ages. I assume usually not by much, but should at least be checked once in a while, perhaps the greatest changes are just after being built, just like with an ICE bike. Nothing is perfect, everything changes a little.
There are three wires from the motor controller to the motor, each 120° out of phase. One rotation makes the full 360°. If the timing to the motor is the slightest bit off, efficiency can decrease a lot. If it gets way out, even worse things can happen, such as losing control of the throttle.
The safe way is to have it done. However, many have gone many thousands of miles with no issues without it being done. So it could depend on luck.
From what I have heard from others here, is that a total loss of regen in the eco mode can be the very first symptom of a very serious problem. At that point, do NOT even ride the bike to the dealer. Have it towed. It can lose all control to the point that even the kill switch will not work. And you have no clutch. You will have to grab the key to shut the bike down.
So don't you think it's best to avoid it getting to that point where it will have to be towed? Simply have it checked once in a while. Especially if it has never been done. I have around 7,000 miles on my SR. It's never been done. But it will get done in a couple of weeks from now. I already made an appointment at the nearest dealer to here.
-Don- Auburn, CA