I've been working with electric bikes for almost 3 years now and as I was browsing my favorite site looking for new ideas I stumbled upon a electric mountain board and started doing research. I started becoming more and more interested in working with rc motors and finally took the plunge making one for myself.
Parts
Board: MBS Comp 95x from MBS Mountainboards.
Motor: Turnigy SK3 6364 from AsiaTees
Sprockets : Scooter sprocket and Motor Sprocket from Electric Scooter Parts
Aluminum pieces: from the scrap yard
The batteries, controller, and throttle were all ordered from AsiaTees
Batteries: Two 22.2v 5Ah lipo batteries.
Controller: 150amp car ESC
Throttle: Wireless 2.4 ghz
Other parts: Wire, electrical tape, wire connectors, nuts and bolts, zip ties, tie down straps.
How to Build
Gather your needed parts and supplies. Most important determine which motor you want and what board you want to use. Also you will need these tools. Tools Used: Socket set, Sawhorses, Hacksaw (or equivalent), Hammer, Adjustable wrenches, Hex key wrenches, Pliers, Clamps, Drill and bits, Grinder ( or equivalent), Metal files, Wire stripper, Chain breaker, soldering iron.
Went to the scrap yard and found some aluminum L-channel. This is what I used to make motor mount/bracket piece form.
I measured, cut and drilled the holes for the mount using the truck as your template since it will be bolted to the truck using the pre-existing brake mounting holes.
I also cut a v out of the center to allow for the mount to sit flush and allow for side to side movement of the truck.
Using pieces cut from the aluminum, a piece scavenged from another project I was able to come up with this mount. ( This will be different for everyone ) Once the mount was made I mounted the motor using the mounting screws that were provided.
Using the brake disc provided with the mountain board as a mount for the drive sprocket I drilled the holes and bolted it up making sure there was enough space for the chain to clear.
After I mounted the drive sprocket to the wheel I installed the motor side sprocket and the chain. ( NOTE* You need to grind down a flat spot on the motor shaft so that the set screw has a flat surface to lock down on.) Also check for chain alignment before tightening down the set screw.
I mounted the controller using industrial 3m velcro as well as the receiver for the wireless remote.
After getting everything mounted and ready I hooked up the batteries in parallel to give me 22.2v 10ah and used Velcro strapping to hold it to the board.
Costs
Material | Cost ($) | Quantity | Total ($) |
---|---|---|---|
Mountain Board | 369.99 | 1 | 369.99 |
Turnigy SK3 6364 | 67.31 + shipping | 1 | 79.24 |
Motor sprockets | 9.95 | 1 | 9.95 |
Drive sprockets | 15.95 | 1 | 15.95 |
Motor Controller | 62.55 | 1 | 73.55 |
Chain | 11.22 | 1 | 11.22 |
Aluminium L-Channel | 13.56 | 1 | 13.56 |
Wireless Controller 2.4ghz | 19.70 | 1 | 25.89 |
Turnigy 22.2v Lipo | 46.66 | 2 | 85.32 |
TOTAL COST | 684.67 |