I made a powerful electric scooter with a kid's bike. this scooter rolls at 38 km / h and can drive 25km. I used a 1000w electric quad motor
i disasemble the bike and put a big motor on the rear wheel. it's a chain tansmission.
you can build a powerfull and cheap scooter yourself with some tools and perks. you must solding the steel with a solder (50$ mini)
soldind is very easy for newbies .
this scooter was made in 2 days and cost 450 $. 100$ for the motor, 250$ for the battery and 100$ for the rest.

sub:    / @marcgyver2464  

-trottler: http://s.click.aliexpress.com/e/5KrenyiM
-chain: http://s.click.aliexpress.com/e/LAwq7U8g
-crown: http://s.click.aliexpress.com/e/NM1LQ4GY
-free wheel for crown: http://s.click.aliexpress.com/e/kEnvyGQk
-driver for motor: http://s.click.aliexpress.com/e/mDZZEMJm
-motor 48v 1000w dc: http://s.click.aliexpress.com/e/DRMXC9yc