Nice drawing BUT... these little motors drive off the left side of the motor and you need a jack shaft setup to move the power to the front sprocket. Sick Bike Parts has a shifter kit that does just that. Look at their expansion chamber, too. I'd rank it as the single most important component you can add, makes any other mods more worthwhile.
Ask questions, read old posts for insperation, take pictures of the build, but most of all keep drawing up bikes