Try this, I expect you will need to rewrite it a bit to fit the tune
He wore leather trousers and biker boots
A leather jacket with an eagle on the back
His bike roared off like a cannonball
Spreading terror everywhere
Unwashed and with unkempt hair
His nails were dirty
and he had a tattoo on his pallid biceps
And on the inside ‘mum I love you’
He had a girlfriend called Mary-Lou
A pitiful child of the time
Because everyone knew full well that between them he loved
Only his bitch of a bike
He wore leather trousers and biker boots
A leather jacket with an eagle on the back
His bike roared off like a cannonball
Spreading terror everywhere
Poor Mary-Lou implored and begged
Saying ‘don’t leave tonight, I will cry if you do
But tears appeared and the words were lost
In the noise of the chopped exhaust
He leaped like a devil with fire in his eyes
At the level crossing against the light and
Against a train heading for the midi
When the trash was disposed of
They found his trousers and biker boots
His leather jacket with an eagle on the back
But never found the bike or the demon
Who spread terror everywhere
Read more: Edith Piaf - L'homme A La Moto Lyrics | MetroLyrics