quelle sonoritée
le 50 cc 2 cyl.
https://www.youtube.com/watch?v=vDd0kVnnqfg&ebc=ANyPxKp9KE-Znuv621dtBmCwPIyMxzdjuerOnMu2lSXvSXwOMUO_7PyGXgAF3dxGpveCnjL70YNWd_tpoMbl4YCbgrPy7tnWhw
le 250 cc 6 cyl.
https://www.youtube.com/watch?v=o57JwibqCb8
le 350 cc 6cyl. de 1967
https://www.youtube.com/watch?v=KoSU7aRBRgg