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Torque sensing 250-350w watt mid-motor installation

Views: 90     Author: Site Editor     Publish Time: 2021-08-14      Origin: Site


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Step 1. Motor installation

Remove the bottom bracket from the original bicycle. You'll need a crank pulling tool and bottom bracket removal tool. You should also remove your pedals at this point. The left pedal has a reverse thread and the right side of the bottom bracket has a reverse thread - usually. Push the motor through the bottom bracket shell of the bicycle. On the odd occasion, you have to file a little bit off the inside of the bicycle shell to remove any protrusions from where the welds form. These kits work with bottom bracket shell lengths of the standard 68-73mm.The motor will extend through the frame and leave enough thread to secure the motor to the frame.



Step 2. Motor securing process

Put the securing plate onto the outside of the motor axle on the non-drive side. Secure the plate to the motor with the two M5 bolts provided. Use washers in between the plate and the motor as required to avoid having the plate pulled onto the motor at an angle. Tighten up loosely .

Screw the large M33.5 nut onto the bottom bracket motor axle using the wrench provided. Put some lock-tite onto the motor axle first.Tighten up loosely, ensuring that you can still rotate the motor in the frame.

 Install the fixing block onto the motor with M48 40mm bolt.Do not tighten yet.

Put the hanging plate above the bicycle chain stays as close to theseat tube as possible. Put the M8 45mm bolt through the hangingplate and bolt into the fixing block on the motor. Tighten thissecurely. You can use a spanner around the end of an Allen key toget extra leverage here.

Now go and tighten all bolts to fixing block, securing plate and bottom bracket axle very securely. Use lock-tite liberally here.


Step 3.Putting on the accessories

Put your cranks on remembering there is a left and right one - they will be marked. Put your pedals on, remembering the left one has a reverse thread.

Install the LCD using common sense.


lnstall the throttle and the thumb control next to the left grip. The throttle is not shown here but in our opinion the best order starting from the outside is left grip,brake level, thumb throttle ,thumb controller.You can remove any gear levers on the left side as you will have only a single front chain with the motor,this allows more room on the dash on the left side for the throttle and thumb control.You do not actually need the thumb control if you have limited room as you can control all functions through the LCD.You also don’t need the throttle if you don’t want to use it.

Install the speed sensor .Put the magnet on an outside spoke on the rear wheel and put the speed sensor as close as you can to the magnet without it actually touching the wheel.Be careful to run the cable along the chainstay well away from the wheel.

You can install the brake levers if you want to.They are not a necessity but will cut out the motor when you activate the brakes.If you hit the brakes hard enough it will overpower the motor in any  case but you’d like the have electric motor cut off when hitting the brakes then you can install these as well.They only work with cable brakes.



Step4. Connecting it up

Connect the thumb control to the LCD


Conncet the brake levels if installed to the back of the LCD display.Have a look at the diagram and at the plugs to make sure you don’t install them upside down,you’ll get an error message on the screen if you do .The  left brake  connects to the left slot and the right to the right slot.The throttle goes in the middle slot but is shown here.

Connect the motor to the LCD display and connect to the speed sensor to the motor.The plugs can only go to one place so it is rather kook-proof


Finally,connect the motor to the battery


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