"It's hard not to grin after doing 50 miles per hour on this thing!"
Fellow hacker Brad Graham of AtomicZombie.com did an awesome job on this electric mini bike named the Sparky V2. This mini bike is a DC electric powered machine, with enough torque to pull a small trailer. Brad mentions that Sparky, "[is] able to run for over an hour at city traffic speeds..." plus, "[it] could be used on the street or at camp without creating any noise pollution." How freakin' crazy is that!
And guess what?! You can build your very own using his detailed plans.
PS: His website is a great place to get ideas and a rich resource when it comes to fabricating a custom mini bike frame. Even though most of the hacking on the site is related to bicycles, it all applies perfectly to mini bike frame design and building.
Here's an excellent three part video series that shows you how to swap
out your small, underpowered 97cc Doodle Bug Mini Bike motor with a
Harbor Freight 6.5 HP engine.
Part 1
Take the throttle assembly and throttle cable off (00:38), take the air cleaner off to get to the throttle assembly (00:58), throttle assembly explained (02:35), making a bracket for the throttle cable using a bracket used for hanging vertical blinds (03:28), throttle cable bracket installed (04:38), installing the throttle cable (06:18), Next step is to pull the old motor, then prepare the mounting plate for the new motor.
Part 2
Just got done draining all the gas out of the motor. Loosen the mounting bolts from the bottom (00:20), Removing the kill switch wires before removing the engine mounting bolts (00:59), Removing the mounting bolts (01:47), pulling the motor off the mini bike (02:20), dry fitting the new motor, checking for chain positioning (03:10), going to have to remove a few links on the chain to make it work (06:38), here's the tool for braking the chain and how it works (07:04), drilling the holes explained (08:20).
Part 3 Watch it Run
At about the 06 minute 37 second mark you can see the mini bike run.
