What does it mean on a 250cc 4-stroke motorbike, if when you rev. high (fast) in the gears it make a pop sound

Question

This is when you release the throttle!!!

Answer 1

It can make a popping sound if you have hit the rev limiter.  which means you are revving it too hard.

Answer 2

it may mean that it is backfiring or  that you are hitting the rev limiter

Answer 3

Most likely you are reving it too hard and hitting the rev limiter.

Answer 4

sounds like its just back firing when you shut off getting it jetted should stop it