Started first build.

Hello. So I purchased a Huffy Nel Lusso to attach a 2 stroke to.
The bike and engine are attached but have run into the coaster brake arm. Do I just disassemble the whole axle and put together with the sprocket on or is there a way to get sprocket attached without taking apart?

I am a little hesitant at this point just cause i was warned this is a pain. I have already purchased a different metal strap to replace the stock brake arm holder.

thanks for your help. I will post pictures when i figure how to upload on here.

thanks. got it all taken care. shes all wired up and pretty close to done. few hours of work and i think ill have her started.