Hi all,

I've recently bought a diy kit and fitted it. All was well for two weeks and then I jumped off a kerb and the electrics cut out.
The kit is a 48v 1500w 15ah
The electrics cut out when using the throttle or pas system (wheel moves barely an inch) and the display/power trips out.
I've metered the battery and it's showing 53.8volts
And is fully charged.

If I connect the charger to the battery and use the throttle and or pas system the bike runs perfectly (unable to test under a load ie; sat on it for obvious reasons)

All connections seem fine the thing that is doing my head in is the fact it works when connected to mains.

At a not of a loss, any help would be greatly appreciated.

Regards

Rick

It is probably a loose connection in one or more of the connectors. Most kits have rather poorly assembled electrical connections. It may take a bit of work to determine which ones are the problem(s). Visual inspection, and tugging on wires; then it is just a matter of repairing the issues found.

If it is possible to check, the failure described sounds like a bad solder on a board. As stated, the connections are subject to a wide range of quality control. The good news is they are fairly easy to fix if they did not "pot" the boards in epoxy. It was probably a borderline connection that popped when you jolted it, so look toward a larger electronic component like a capacitor or the like with some 'mass'. Might be obvious when you open it up.

Does it run on the battery only with no load (lift the hub motor wheel off the ground) ?

Hi All,

Thank you for all the replies, I've located the fault it was a dodgy spade connector from battery which had a lot of burnt rubber insulation stuck in it.
(couldn't see at first as it had an inch or so of sleeving covering it) The smoke and burning gave it away.
Have ordered some better connectors so will be back on the road in no time.

Cheers for the advice

Regards

Rick