Kudos Duke Motor not engaging?

[Maverick777]

Hi All,

My Duke has stood idle during the winter months and I have topped up the battery once. I've given it a spring clean with soapy water (which as I write might might be the issue) after which I let it dry and sprayed liberally with WD40. I've gone for a test ride all the LED's come on, but as I pedal, the motor is not kicking in? Any ideas please?

Thanks

 

[Jimod]

Hi All,

My Duke has stood idle during the winter months and I have topped up the battery once. I've given it a spring clean with soapy water (which as I write might might be the issue) after which I let it dry and sprayed liberally with WD40. I've gone for a test ride all the LED's come on, but as I pedal, the motor is not kicking in? Any ideas please?

Thanks

A couple of things come to mind: 1, make sure the cable connector near the back wheel is fully shoved in. 2, check the pedal sensor is close enough to the magnets on the crank. I've had both of those issues over the years. The magnet thing was caused by mud on a canal tow path cleared by cleaning it down with a big leaf. The cable connector was caused by me changing a tube after a puncture.

 

[Deleted member 4366]

You're not giving us much to go on.

Are you capable of doing basic electrical tests with a voltmeter?

 

[Maverick777]

What do you want me to elaborate on?

You're not giving us much to go on.

Are you capable of doing basic electrical tests with a voltmeter?

What do you want me to elaborate on?

 

[Deleted member 4366]

Is the bike switched on?
Are the display lights on?
How much battery level is showing?
Did you try the throttle?

You still haven't answered my previous question.

 

[Maverick777]

Hi d8veh,

I'm only fimiliar with this bike, and I assumed if all the LED lights were on, that it was switched on and fully charged? As far as i can see, it's not fitted with a throttle?

Having read Jimod's post. i checked the magnet thing and the magnets have corroded. So this could be the cause of the problem. All connections appear ok.
I can test with a voltmeter, but where what would I be testing please?

Thanks

 

[Deleted member 4366]

Rusty magnets shouldn't be a problem.

The controller sits in the compartment at the front of the battery. Unscrew the cover to get at it. Follow the wire from the pedal sensor to the controller, where, hopefully, you'll find a three-pin connector. With everything switched on, check that there's 5v between the red and black wires by sticking your probe up the back of the connector while connected. If you have the 5v, check again between the black and the third (green?) wire. The 5v should switch on and off as each magnet passes the actual sensor behind the crank. You might need a helper to turn the crank very very slowly to do that test.

I'm assuming that it doesn't have the more modern cylindrical moulded multi-pin connectors. If it does, you need to open the controller and test directly on the pcb where those wires connect.

Lights on your display panel is a good sign, but all it means is that it's getting the 36v from your battery. There's a wire from the battery that goes directly to it. When you switch it on, it sends that voltage back to the controller down another wire to power the controller. That power then gets converted to 5v for the controllers CPU, the motor hall sensors and the pedal sensor. The 5v measurement confirms that the controller has power and it's working.

If you had water in the display panel, it might still switch on, but not send the power to the controller.