From what I can see of those tests, then yes you are right.
All systems need a safe working load and it would be daft to fit a motor that performed at 250 watts but burned out at 251 watts.
We know that the motors supplied by the Chinese have different markings to satisfy the various legislative...
I may be quite wrong, but I get the impression that it is in fact the controller, not the motor that is important.
A controller set to deliver no more than 7 amps at 36 volts will allow the motor to develop 252 watts.
Up the amps and the wattage goes up.
There is no such thing as a 250 watt...
It could be that the chain breaker itself is critical and it is necessary to ensure that the rivet is properly, fully pushed home evenly on both sides. I must confess that I did not check this point.
I have only ever had one chain snap.
I am certain that it broke where I had joined the chain with a chain breaking tool. There was no sign of the rivet, it must have come out of both sides at once.
Which leads me to,
Should you ever use a chain breaking tool?
Shimano insist that their chains...
I think that the danger is that if we leave a fake review in the forum, sooner or later, someone googling the name will come to the forum and read a glowing review of what we all know is a piece of junk.
Is a narrower chain necessarily weaker?
If the side plates and rivets are still the same size and thickness as a wider chain, I would think that the strength is the same.
Boy, am I glad that both my Woosh and the Tonaro are fitted with simple magnet ring, throttle, bog standard controllers etc.
It is almost as though the Bosh has been deliberately designed to keep LBS's in a steady supply of work.
I know that it sounds obvious, but I should check the battery, have you tried charging it?
Could be that the battery is worn out, shows a full charge on static test, but cuts out when you try to draw serious power