Lms 70cc kids pitbike swap why

Description:

Lms 70cc pitbike kids pitbike motorbike
Rev and go so easy to ride.
Powerful bike.
Needs some tlc
Runs and rides and stops.
Bought as a non runner for my son and got it running.
Too much for my lad so looking to get him another 50cc
Good bits:
New wiring loom
New cdi
New coil
New stator
New ignition
New battery
The battery in the pic is not the new one.
New starter button and cut out switch.
Starts and runs, stops and has plenty of power.
Bad bits they all have them:
Starter motor chain is a little slack maybe could be adjusted. But it doesn't affect it in any way.
Plastic on front has been painted.
Bits of rust.
Not a brand new bike but does what's its intended to do.
Willing to do px cash either way for a 50cc
Or a quad or even 2 bikes and ill give cash.
I have a video of it running and revving up