NCM Moscow motor seems to be pulsating rather than continuous?

[Azzer]

I have a NCM Moscow and the motor seems to be pulsating rather than continuous. Any ideas what the cause might be please?

 

[Rawly Old]

1st check for loose connection from the wheel, then display. Depending on high mileage, your controller
may be going, If so they are now virtually impossible to obtain**. I paid Amego for one,($150). They sent
the wrong one & swore up & down that's what I ordered. They flat out lied. Said I must order the right
one before I'd be eligible for a 'partial refund after I returned the 1st one. My moscow controller recently
died @ 8,000 miles. Und zo, I bought a 'Wired Freedom', which is like a fat moscow on steroids. The
Wired is simply beyond beyond, crazy power, range, & speed on the latest dual battery model!
Probably totally illegal in the U.K., 43 mph, 3200w peak, 2 60v batteries, 1500w motor, 90+ mi. range,
2100wh, 35 Ah. programmable for classes 1,2, & 3, etc, etc. It's a monster!

**in the U.S, anyway.

 

[Kaihukid]

Hi, my wife had a Milanjo Plus with a similar problem, the motor was cutting in and out with the rotation of the pedals. After a bit of investigation I traced it to the cadence sensor on the left hand pedal. After removing the pedal, I was able to pull off the sensor and using it's LED indicator check the output, all seemed normal. I then pushed out the rotating part of the sensor to check the status of the magnets, using a small nail on a piece of string I check the strength of each magnet by lifting up the rotating part. I found that one of the magnets had almost no attraction to the nail at all. I purchased a new ( 2mm x 2 mm ) neodium magnet, cost of NZ$ 1-80 and replaced the faulty one. Reassembled the removed parts and now all working as normal. Hope this is of some help. Dave