Hey, that's not right! You'll never find more than 4 people on a single bike, be it Bullet or a 100 cc bike. But, that's 4 adults! Sometimes, you'll see a man, his wife and three kids on a scooter. The stock spring rates are not good enough for milk delivery service. Milkmen lug 4-5 drums of milk weighing no more than 300 kg on the Bullet 350. Their rear shocks are modded to use springs from the Lambretta's rear suspension. Without the milk drums, the rear suspension would not will not work at all. I've seen at least 3 1979 Bullet 350s of the same batch as mine doing rounds in my hometown.
Just thought I'd address some of the inaccuracies in your statement.