Monday, 6 February 2017

Notes on MY1020Z Motor

Notes on MY1020Z Motor - Intro

This is a fairly inexpensive geared motor made in china. It can be run at least up to 48v. I have tried 48v, and also 24v.

The MY1020 is a ungeared version of this motor, whilst the MT1020"Z" has reduction gearing.

Notes on MY1020Z Motor - Controllers

Yiyun Controller I have found to be good, very simple and reliable. I have used 350w (24v), 500w (24v) and a 800W (48v) variants of this with the MY1020Z.

MY1020 Mounted on Cargo Trike

MY1020 - Mounted in front wheel of cargo bike.

Notes on MY1020Z Motor - Performance

The MY1020Z is sold advertised at wattages ranging from 450w to 600W, it will take a lot more wattage than this. My MY1020Z has spent its life driving a front wheel driven 20" wheel ebike. At 24v 500W this will pull bike a rider up a steep hill at around 7 mph, but owing to a reduction in revs, the engine heats up. Some pedalling is required.

This was achieved with further reduction gearing with the 11 tooth sprockets linked with a 24 tooth freewheel.

This 11 to 24 tooth reduction was also used with the same setup, but with 48V 800W controller, this delivered much speed with little increase in torque.

The above setup would be useful in flat areas of the USA, where this wattage is just about legal. But in the UK, it would be advisable to lower max speed to 15 miles per hour.

This would require an 11 to 48 tooth reduction, to give a 15 mph approc top speed.

Notes on MY1020Z Motor - Chain Gauge

The M1020Z comes supplied with a large gauge sprocket, commonly used on small scooters etc. But sprockets for bicycle chain can be purchased from TNC Scooters.

Notes on MY1020Z Motor - Alternatives

For a more refined, efficient and altogether better choice I would recommend and Bafang BPM 500W.

Notes on MY1020Z Motor - Conclusions

Working in it favour the MY1020Z is a simple motor that is easy to wire, and provides good level of power if used with the right controller and battery. Owing to the fact that it powers a chain (rather than the wheel directly like a hub motor) this gives freedom to choose gearing. 

However, it is rather heavy. You will probably need to be able to weld in order to fit this to a bike, as it will require a sturdy mounting point. Its size on a bicycle will make it stick out of the side considerably. 


  1. How is the gear held on the front wheel?
    Is it a 6 point disc mount with the sprocket mounted to that? (I notice you have time brakes)

  2. It is a rear wheel mounted on the front wheel. The drop out was cut and re-welded to give a 110mm spacing.

    So the gearing is attached like a normal screw on free-wheel.

    The U brakes are rubbish. Really really terrible.

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