peugeot speedfight 3 50cc 2t drive belt

Hi want to change drive belt just wondered is easy to get of do you have to release tension to get off and retension when you fit also any special tools needed thanks sorry totally new not done before cheers

 

3/8" air ratchet gun or a variator locking tool.
Undo variator nut, remove front pulley, squeeze together the clutch halves, remove belt.
Reverse procedure for the new belt, drop of thread lock on the variator nut, torque to spec.