well-timed

adjective2

1. •
   Happening at an opportune or advantageous time.

   • Their most recent release to the market was well-timed.
2. •
   Keeping accurate time; in keeping with accurate timing or rhythm.

   • A well-timed snare drum enlivened the music.
   • A well-timed engine with an unaggressive cam profile will purr like a kitten and is unlikely to backfire even upon sudden throttle changes.