Ezee Forte Problem

[Tony P]

50 Cycles site is down so has anyone any experience of the following please. Motor was stuttering on last mile home so I figured the range had been reduced in cold weather and I fully charged the battery as normal. Green light on charger after normal period and Green light on Battery Meter so figured all ok but as soon as I open the throttle the motor clicks but doesn't run and the Meter drops to Red, whilst the diagnostic light blinks 6 times supposedly indicating low voltage contrary to charger and meter. Repeat process and back to Green all round but still no joy so figure battery u/s although has only done 500 miles. Have electical chum check battery, which registers 41.7V on his meter which he says is normal for a 37V battery. He lights some lamps with the battery, although advises this doesn't really put sufficient load to test amperage and the lights on the bike still work anyway.
Any comments would be most welcome please.

 

[flecc]

That could indicate a high resistance/poor connection preventing sufficient current getting through, though the correct voltage is indicated.

The contacts from battery to bike are the first suspect, make sure they are clean and plug and replug the battery a couple of times to ensure the connection is made ok. Operate the key switch on/off a few times.

Other than that the connection problem could be inside the battery case where the leads are bolted onto the base contacts, you can see that here

Then the cable connections under the bike's battery base plate which are also bolted on. Since these lead to the controller, that's the end of the possible poor connection path.

After that, the problem will most likely be either inside the battery or in the controller.
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[Tony P]

Thanks Flecc my electrical chum was talking about 'resistance' as the likely cause, which I thought meant shorting out to which he said no because that would blow the fuse but I now understand that a weak connection can cause a 'high resistance' because the current can't pass through. Unfortunately, he is 87 so I was able to get the battery to him but I can't get him to the battery or the bike. Much appreciate your comments I will have a look at the obvious connections as advised. Tony P