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Thanks for choosing MJM 

We are excited that you have chosen to join the copper movement. MJM  
was founded on the goal of delivering an uncompromised product that also 
doesn’t cost a fortune. We love to help our customers find that inner child joy  
of riding a bike without the effort and strain of having to pedal yourself up  
hills and through wind. 
Read through this manual carefully before operating your bike for the first time.
We highly recommend having a bicycle mechanic assemble your bike if you are 
not comfortable doing it yourself. 
If you have any questions about your product, please reach out and ask. 
You can contact us at: 
calgarysales@mjmwheels.com 
403 475 6488
Again, thank you for choosing MJM. Ride On!

Safety Check

It is important to check over the bike before use to ensure a safe ride. 
Check all quick releases to ensure they are tight. This includes the front  
wheel and seat post. Ensure wheel bolts, brake caliper bolts, handle bar bolts, 
and pedals are all tight. Inflate tires to within the recommended psi range.  
For the MT21 we recommend 47 - 50 psi. Test brakes and shifter to make  
sure they are operating normally.

MT21

User Manual

Summary of Contents for MT21

Page 1: ...User Manual MT21 ...

Page 2: ...hanic assemble your bike if you are not comfortable doing it yourself If you have any questions about your product please reach out and ask You can contact us at calgarysales mjmwheels com 403 475 6488 Again thank you for choosing MJM Ride On Safety Check It is important to check over the bike before use to ensure a safe ride Check all quick releases to ensure they are tight This includes the fron...

Page 3: ...cally for bikes Apply every 100km to keep your bike running smoothly Inspect the spokes to ensure they are tight With the extra stress the motor puts on the rear wheel it is important to regularly check for any loose spokes If some seem more loose than others use a spoke wrench to tighten them to be the same tension as the others Inspect your bike on a regular basis for wear or any potential issue...

Page 4: ...t fit the bottom of the battery to the bike Then push the rest of the battery into place Press firmly until you hear a distinct click indicating the battery is locked to the bike To remove the battery from the bike first insert and twist the key located on the side of the bike The battery will unlock and drop slightly Then using the dial on the front of the battery twist left or right to fully unl...

Page 5: ...s on the charger contact MJM as there is likely something wrong with the battery or charger avoid blocking the fan on the charger to prevent overheating avoid charging in extreme temperatures Charging between 10 25 degrees Celsius is ideal do not charge in strong sunlight only use the charger that has been supplied to you If you require a new charger contact MJM and we will be happy to assist Batt...

Page 6: ...ll your information To turn off press and hold the power button until the screen turns off It should only take a few seconds Note The bike will automatically turn off after 5 minutes if the bike is stationary Display and Controller Note First ensure the battery is charged and installed on the bike correctly ...

Page 7: ... is turned on press and hold the button After a couple seconds you will see the headlight icon pop on your display both the front and rear lights will turn on Once you see this release the button and the lights will remain on until turned off or the bike turns off To turn off repeat this process until you see the lights turn off Walk Function The walk function activates the motor at a slow speed t...

Page 8: ...rage speed TIME Tracks your total ride time ODO Odometer will display the total kilometers the bike has travelled This cannot be reset TRIP By default when you turn the bike on it will display your trip in the bottom left This will track the distance you have travelled in kilometers and can be reset whenever you desire See settings mode for these instructions Settings ...

Page 9: ...ettings section Dormancy Sets how long the bike will stay on before shutting off when there is no input The default is 5 minutes Unit Can toggle between metric and imperial measurements Password If you would like to set a password to lock the display whenever the bike turns off you can set that here The default is no password Factory This will reset everything back to its original factory settings...

Page 10: ...hanging any of the advanced settings Error Code 21 Current Abnormality 22 Throttle Abnormality 23 Motor Abnormality 24 Motor Hall Signal Abnormality 25 Brake Abnormality 30 Communication Abnormality In the event your ebike flashes an error code contact MJM and we will be happy to assist you 403 475 6488 calgarysales mjmwheels com Settings ...

Page 11: ...ropyl alcohol Get it checked over We recommend you have your ebike professionally inspected once a year This is a service just about any bike shop offers and is something we offer in our shops for 50 This inspection will ensure your bike is working well and will enable you to stay on top of the wear your bike will inevitably endure As you ride parts like your brakes tires chain and gears all slowl...

Page 12: ...r electrical components subject to no apparent abuse The warranty replacement diminishes by 1 12 for every month of the year Frame 3 year warranty on the frame for cracks again subject to no apparent abuse Warranty does not cover wear parts like tires brakes and chain Warranty ...

Page 13: ...13 MJM Wheels 3324 114th Avenue SE Calgary Alberta T2V 3V6 403 475 6488 calgarysales mjmwheels com mjmebikes com Contact ...

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