Electric Toy Quad Runner Motor Upgrade Version 1
Link to new rebuilt version 2
My nephew finally managed to wear out the motor drives on his electric quad bike. My brother was going to give to me for parts but I decided to see what could be done with it. The original gears were ok but the axle pins on the gears had worn through the plastic mounting blocks and would allow the gears to slip. There wasn’t much I could do with what was left so I decided to do an upgrade to the drive system with a motor and gear box I had in my stash of junk.
The motor and gearbox was for a garage door but the a.c. electric motor had died long ago so I used part of it’s case and attached a 12v dc fan motor to the gear box. It works pretty well and is very quiet since it is a worm gear system. It also has steel gears in an oil bath.
I fabricated a motor mount and cut out the back of the plastic to allow a chain and gear on the axle shaft.
After finally getting a good battery hooked up, it looks like I’m going to have to either put a bigger gear on the axle or use a bigger motor. (I have a few of them) It would work but was too fast on smooth ground and didn’t have the torque I know it should have had for going over rough ground. At the moment the gear ratio is 1/1 but I’m going to change it to 1/2.5. This should solve all the problems and let it drive though loose sand also.