Re: New Guy from Chicagoland
Welcome to the forum. Since the kick back 2 speed has a coaster brake, a motor sprocket should attach as it would with a single speed coaster hub.
Attaching the kit sprocket to a coaster brake hub can sometimes require some bending of the brake arm. Some coaster hubs require the dust cover be ground down a bit for a good sprocket fit.
My Shimano coaster required no mods for sprocket installation. I did have to use a couple of the flat coning wrenches.
You should be able to attach the motor sprocket to your KB hub with simple tools like a couple of crescent wrenches and a file if needed.
I visited Chicago this summer for the first time. It was Lullapaloosa (sp?) weekend so the waterfront was packed. I'd love to spend more summer vacations there.
“You're only young once, but you can be immature as long as you like" -Unknown