What are some electric motors that can replace the 49cc gas motor of my pocket bike.?

[kyleryantoth]

I have this bike exact
http://www.tomaliscooters.com/pd_x2.cfm
here are the stats
http://www.thesuperkids.com/nisux2pora3t.html

I found a motor that is used on scooters

http://www.scootercatalog.com/electircmotor-e7.html



I would like for someone to match up an engine, battery, speed controller, and possibly charger that will fit the bike. Please no snobby remarks I get those far too often. The bike still runs and everything is fine I would just like to be able to experiment with electric power.