From a Facebook user and AI
The Bombardier 50cc motorbike from 1972 was a small, two-stroke, 3 (maybe 4) gears on the right side and the rear brake on the left side, headlight made in France. Here, the gear case was removed. (https://museebombardier.com/en/artefacts/bombardier-bantam-trail-motorcycle/).
Photo Pinterest https://au.pinterest.com/pin/268316090278202747/